Abstract: A method for cutting piled fabric is provided. The method includes the steps of bending the pile elements downward towards the fabric base along a line to be cut and thereafter cutting through the bent piling elements and fabric base to form a two-sided cut. Such method shears piling elements adjacent to one side of the cut while leaving the pile elements adjacent to the other side of the cut substantially unaltered.

Abstract: A pattern cutting apparatus for paper margin, is characterized by having a plurality of lower mold holes of perforate pattern disposed in alignment and paralleled to the distal end of a cutting space, and guide mold holes sharing the common shape with the lower mold holes disposed on a protruding portion of a guide mold board positioned in spaced parallel relationship above said lower mold holes for inserting an upper mold body sharing the common shape.

Abstract: An apparatus for cutting notches in the ends of metal or plastic pipes and tubes, the apparatus being a bantam twin pipe notcher, comprising a base plate with alignment pins for mounting to a press; the base plate further including two vertical parallel die holders wherein a spring-loaded punch holder with a cutting tool and die blocks are mounted therebetween. The opposite ends of the cutting tool has cutting ends of different radii or shapes for notching two different size pipes or tubes without interchanging the tool and die combination.

Abstract: A press device which can be produced at a lower price includes a slide cam base, a slide cam guided by the slide cam base for mounting a machining member such as a punch, a biasing member provided between the slide cam base and the slide cam for biasing the slide cam, and an actuating cam for abutting the slide cam to drive the slide cam. When the slide cam base holds the slide cam, a pressing at a high accuracy with little deflection can be performed and the time required for machining the holding portions of the slide cam is short. The slide cam is slidably provided on a circular-section guide post installed on the slide cam base.

Abstract: An apparatus and method for cutting piled fabric sections such as carpet tiles is provided. The apparatus comprises a frame, a bending assembly for bending pile elements away from the normal substantially vertical orientation with respect to the base of the fabric along a line to be cut, at least one cutting blade for cutting the fabric through a portion of the bent piling elements and fabric base and power assemblies for powering the bending and cutting operations. The related method comprises the steps of bending the pile elements downward toward the fabric base along a line to be cut and thereafter cutting through the bent piling elements and fabric base to form a two-sided cut. Such method shears piling elements adjacent to one side of the cut while leaving the pile elements adjacent to the other side of the cut substantially unaltered.

Abstract: An apparatus for cutting a sausage product has an elongate, generally cylindrical housing and a generally annular cutter member. The housing has an axis, a circumferential side wall with radial inner and outer surfaces, and first and second axial ends. The housing defines a cutting chamber sized for receiving the sausage product, and the side wall includes a plurality of elongate, generally parallel axial slots extending therethrough. The slots are generally equally spaced from each other around the circumference of the side wall. The cutter member has an axial length and a curved inner circumferential surface with a diameter at least slightly greater than that of the outer surface of the housing side wall.

Abstract: A method for making perforations in a continuous film which is thereafter cut into individual filmstrips having variable lengths. A die set unit of the perforator has a plurality of punches and corresponding dies which are respectively arranged along the continuous film. The die set unit performs die-punching N times (N=1, 2, 3 . . .) in every first section having a variable length Lx, and the measuring feeder transports the continuous film by a first length after each of (N-1) times die-punching and by a second length after the last die-punching for every first section. The first length is given as Lx/N, and the second length corresponds to the first length plus the length L2 of a second section disposed alternately with the first section along the continuous film. In alternative, the die set unit is constituted of first to nth die sets aligned in order from downstream to in the film transporting direction. The ith die set of the die sets has a number Gi (i=1, 2, . . .

Abstract: An automatic reconfigurable die having an array of knives, each of which is separately pivoted and extended along and about a respective longitudinal axis, to allow a desired contour to be scored and cut from a sheet material, according to a real time computer plan which is controlling the array of knives. The automatic reconfigurable die includes actuators associated with each knife to control, via information associated with a remote computer system, the extension and retraction, and orientation of the knives. The computer selects the appropriate setpoints for each knife in order to match the required shape/pattern of the cut by simple curve fitting methods. In this manner, a selected plurality of the knives in the array are chosen, oriented and extended in real time to score/cut the selected part.

Abstract: An apparatus for precision cutting of fiber tow is provided which includes a structure for securing a taut length of fiber tow between two points, a movable cutter, and a structure for guiding a cutting edge of the cutter substantially perpendicularly against the taut length of fiber tow at a predetermined point between the two points. A method of using the apparatus is also disclosed.

Abstract: A method for making perforations in a continuous film which is thereafter cut into individual filmstrips having variable lengths. A die set unit of the perforator has a plurality of punches and corresponding dies which are respectively arranged along the continuous film. The die set unit performs die-punching N times (N=1, 2, 3 . . . ) in every first section having a variable length Lx, and the measuring feeder transports the continuous film by a first length after each of (N-1) times die-punching and by a second length after the last die-punching for every first section. The first length is given as Lx/N, and the second length corresponds to the first length plus the length L2 of a second section disposed alternately with the first section along the continuous film. In alternative, the die set unit is constituted of first to nth die sets aligned in order from downstream to in the film transporting direction. The ith die set of the die sets has a number Gi (i=1, 2, . . .

Abstract: A method for making perforations in a continuous film which is thereafter cut into individual filmstrips having variable lengths. A die set unit of the perforator has a plurality of punches and corresponding dies which are respectively arranged along the continuous film. The die set unit performs die-punching N times (N=1, 2, 3 . . . ) in every first section having a variable length Lx, and the measuring feeder transports the continuous film by a first length after each of (N-1) times die-punching and by a second length after the last die-punching for every first section. The first length is given as Lx/N, and the second length corresponds to the first length plus the length L2 of a second section disposed alternately with the first section along the continuous film. In alternative, the die set unit is constituted of first to nth die sets aligned in order from downstream to in the film transporting direction. The ith die set of the die sets has a number Gi (i=1, 2, . . .

Abstract: A compact hole punch for manually punching holes through sheet-like material to produce hole sets which enable the material to be mounted on multi-ring binders. The hole punch includes male and female plates, which in operation move convergently between an open position and a collapsed position and are retained in a parallel relative orientation by pivotally mounted support posts and a spring. The male plate carries a plurality of punch pegs while the female plate carries corresponding die openings through which the punch pegs penetrate to cut the holes in the material when the plates are pressed together. An adjustable slide member is removably mounted on the female plate for engagement with the posts to lock the hole punch in the collapsed position. The slide member also acts as an adjustable stop guide for positioning the material within the hole punch.

Abstract: A punch includes a base portion on which at least two punching units are disposed. The punching units are connected by a shaft extending therethrough. Each one of the punching units has an actuating device securely disposed to the shaft. The actuating device has at least one toothed element, a box portion disposed to each one of the punching unites and a block disposed in the box portion. The block provides a passage defined longitudinally therethrough and a punching rod disposed to an underside thereof and received in the passage. The block has at least on rack disposed thereto so as to engage to the toothed element such that when the shaft connected to a handle is pivoted, the block is moved downwardly, and each one of the punching devices slidably moves along the shaft so as to adjust a distance between two punching units.

Abstract: Toothed perforating rules upon the die roll of the rotary die apparatus form tear strips, punchouts, reverse fold lines, nicking connections and similar weakened or frangible sections in corrugated paperboard sheets during passage thereof through the nip between the die and anvil rolls of the apparatus. The teeth of the die rules are tapered and sharpened, and produce perforations in the paperboard panel that decrease in size with increasing distance from the inner liner of the paperboard sheet. The teeth produce an array of relatively long slits in the inner liner of the sheet, and underlying shorter slits within at least one other ply of the panel. The toothed die members may extend at any desired angle or angles relative to the machine direction of the apparatus and/or relative to the direction of the corrugations within the paperboard panel.

Abstract: In a sheet output system with a stacking tray for accumulating, registering, and stacking on top of preceding sheets in a superposed set stack the printed sheets sequentially individually outputted by a reproduction system; a low force sheet hole punching system integral the output stacking tray for punching holes through only one individual sheet at a time on top of the set stack, before the next sequential sheet is so registered and stacked, with all of the sheets having underlying commonly superposed sheet holes which function as a punch die.

Abstract: A method and apparatus are provided for cutting a decorative groove in a matboard. The matboard is positioned adjacent a guide. A carrier is adapted to be moved along the guide with two blades oriented in separate planes which intersect each other and which lie at an oblique angle relative to the matboard. One of the blades is inserted into the matboard at a selected first depth. The carrier is moved along the guide for a predetermined length of travel to make a first cut in the matboard defining a first side of the groove. The blade is then retracted. Then the other blade is next inserted into the matboard to a selected depth at least intersecting the first cut. The carrier is then moved back to the initial location to make a second cut in the matboard defining a second side of the groove. In a preferred embodiment, the tips of the blades are offset from each other relative to the length of the groove.

Abstract: A right angle shear press in which the upper blades are able to be positioned at a partially retracted park position and moved to a partially extended position to match the size of the shear cuts to a reduced stroke. A servocontroller and position sensor is used to control the stroke of a hydraulic actuator with a CNC controller allowing program controlled shear positioning and stroking.

Abstract: An apparatus (10) for cutting multiple strands of material such as radar reflective chaff comprises at least one movable knife blade (36) with a series of ejector pins (26) which lightly contact the material surface during cutting and a stripper plate (40) which is pressed against the material surface for holding the material during cutting. During cutting, the ejector pins (26) and stripper plate (40) are moved into contact with the material, the blade or blades (36) then cut through the material and the pins (26) and plate (40) are retained in contact with the cut material whilst the or each blade is withdrawn from the cut material.

Abstract: A slitting equipment, piercing various patterns of ventilation slits in thin material, comprising a frame, a main cylinder, auxiliary cylinders, and a plate with knives. Upon an electric impulse from a bag-making machine, to which the present slitting equipment is attached, the auxiliary pneumatic cylinders press and stretch the thin material when the main pneumatic cylinder activates a plate, to which is attached a multitude of cutting knives, up and down the vertical plane. The sharp knives pierce and cut the stretched, thin film in the designed pattern. When the knives have disengaged from the material, the auxiliary cylinders release the film, and the latter is free to move horizontally, while restricted vertically by the top and bottom supports of the machine. As a result of this procedure, ventilation openings have been created simultaneously with the sealing and shaping processes carried on by the bag-making machine, without producing any waste material.

Abstract: Toothed perforating rules upon the die roll of the rotary die apparatus form tear strips, punch-outs, reverse fold lines, nicking connections and similar weakened or frangible sections in corrugated paperboard sheets during passage thereof through the nip between the die and anvil rolls of the apparatus. The teeth of the die rules are tapered and sharpened, and produce perforations in the paperboard panel that decrease in size with increasing distance from the inner liner of the paperboard sheet. The teeth produce an array of relatively long slits in the inner liner of the sheet, and underlying shorter slits within at least one other ply of the panel. The toothed die members may extend at any desired angle or angles relative to the machine direction of the apparatus and/or relative to the direction of the corrugations within the paperboard panel.

Abstract: A cutting instrument includes a base plate and a pair of cutting blades slidably mounted to the base with a slide block and rail system for cutting movement. A reference rod assembly is provided to maintain the internal flutes of a corrugated paper board in parallel relationship to the cutter blades during cutting to ensure first and second cut edges which are precisely parallel to the flutes. The reference rod assembly comprises two pairs of parallel reference rods which project in a common plane from a key stock plate. The distal ends of these rods, after respectively passing through flutes in the paper board to be cut, are adapted to be received in blind bores formed in a side surface of a guide rail to support the reference rods on the rail. The key stock plate further includes a pair of parallel positioning pins which are received in a pair of bores formed in a side edge of the base plate.

Abstract: An apparatus for laying a wire in a junction box comprises means for performing the steps of: setting (S1) a covered wire E on a wiring plate along a wiring pattern arranged on said wiring plate by causing a relative movement between a wire feeder which successively feeds a single wire and the wiring plate along guide means formed on the wiring plate; cutting off (S2) portions unnecessary for conductive circuits from the wiring set on the wiring plate; and forming (S3) the conductive circuits in the junction box by inserting the wire remaining on the wiring plate into the wire-coupling portions of connecting terminals secured to a base and by removing the junction box from the wiring plate. Thus, it is possible to speed up the wire-laying work in a junction box having many conductive circuits.

Abstract: The present invention discloses a device for recycling a tube such as a core having housing which has an upper side, a lower side, and a first side. Attached to the upper side is an input chute. The input chute receives the core. The bottom end of the core is fed into a traveling horizontal blade as well as a splitter blade. The travelling horizontal blade makes a horizontal cut proximate to the lower end of the core whereas the splitter blade makes a cut proximate to the lower or distal end of the core in a vertical direction. The same piston that pushes the splitter blade and traveling blade into the core then pushes the core into a stationary blade which makes another horizontal cut and separates a piece from the core which then drops into a storage area. The same piston which pushes the splitter blade and traveling blade can then push the pieces in the storage area toward a discharge chute.

Abstract: A tool used for an upper tool blank separating station has a plate provided with numerous apertures and a lower surface provided with one of a two-layer system of fastening with a first of the two layers having a plurality of loops and a second of the two layers having a plurality of catches or hooks for engaging the loops, and an upper surface of each block at least partially covered with the other of the two layers so that when the block is pressed against the lower surface of the plate, it is mounted thereon.

Abstract: A system is disclosed for manufacturing fully mitered step lap transformer cores which are formed from separate sheets which are laid face to face to form the separate pieces of the core. The system includes an X-shaped shear arrangement including four blades lying on an X-shape and meeting at a center point. Upstream of the X-shear is provided a hole punch so the punched hole can be moved to the center point of the X-shear and any two, three or four of the blades actuated to provide a required shape in the material to be cut. The X-shear allows the formation sequentially of all of the five sheets necessary for the core and then these are stacked simultaneously by a lifting carriage which lifts each sheet in turn while orienting it properly relative to the other sheets carried to form a single layer of the core which is then deposited upon a stacking table.

Abstract: A multi-hole punch and ruler combination which is especially adapted for storage in and use with a multi-ring binder. The ruler provides a receptacle for receiving the punched out paper chips, as well as a plurality of retention tabs and support tabs for securing the punch in the receptacle in a press fit engagement which may be readily released by the user when desired. The punch comprises relatively low profile upper and lower portions, the lower portion having a defined paper receiving area with front and side edge borders for accurately aligning the edge of the paper relative to the punch members. The lower portion also provides a plurality of cantilevered fingers for receiving the paper edge adjacent the punch holes through which punch members on the upper portion of the punch can protrude and cut or punch holes in the paper sheets received by the punch of the invention. These fingers hold the edge of the paper sheet to separate the sheet from the punch members after the sheet has been punched.

Abstract: The invention concerns a punch block support arm adaptable to a perforating device as well as a process for mounting punches on such a block. According to the invention, the block comprises a narrow slot (12, 20, 23) across the whole block thickness, and extending on the whole length of the punch array. The slot extends, at each of its ends (23), perpendicular to the alignment axis (26) of the punches (20, 22), in order to define a longitudinal bar (14) and two transversal bars (15, 16), the slot being located so that the distortion of the longitudinal bar brings relatively closer the portions of transversal bars so as to immobilize the punches.

Abstract: A punching arrangement has a guide assembly for guiding movement of a second die at an acute angle relative to a first die in order to punch an aperture at an acute angle in a flange of a track shoes. A positioning device moves the track shoe to a preselected location relative to the first die in response to movement of the second die toward the first die. A holding apparatus engages the track shoe and clamps the track shoe to the first die in response to further movement of the second die toward the first die. A crank mechanism breaks the second die away from binding engagement with the track shoe after punching and enables the second die to return to the initial position. The punching arrangement is particularly suited for use in a punching press.

Abstract: A cutting apparatus having a holding member for holding a sheet; a plurality of cutter member for cutting the sheet held by the holding member; and a shifting member engaged by the plurality of cutting member, for shifting the plurality of cutting member in parallel with each other. The shifting member is so designed that it can shift the cutting means without aligning them perpendicular to a cutting direction during the cutting of the sheet.

Abstract: A hydraulically actuated tire cutter includes a first conveyor belt which loads a tire into a tire cutting position between a fixed plate, a moving plate and a plurality of adjustable bars. Twelve corresponding pairs of gripping jaws project from the fixed and moving plate. The gripping jaws have a saw tooth edge. Each pair of gripping jaws of the fixed and moving plate are in registration with one another to compress the tire until one of the tire's beads essentially touches the other. Twelve blades attached to a blade plate are hydraulically actuated to pass through a passage in the moving plate and the fixed plate to radially cut the tire. After the tire has been cut, a second conveyor belt removes the pieces of tire from the bottom portion of the tire cutter.

Abstract: A three side trimmer is provided with a trimming table having a base, a first cutting stick fixed on the base opposed to a front edge trimming cutter in order to receive the knife edge of the front edge trimming cutter and, a table structure including a pair of elemental plates movable on the base along a direction parallel to the length of the first cutting stick. The first elemental plate of the table structure is provided with a second cutting stick arranged perpendicular to the first cutting stick in order to receive the knife edge of a top edge trimming cutter. The second elemental plate of the table structure is provided with a third cutting stick arranged perpendicular to the first cutting stick in order to receive the knife edge of a foot edge trimming cutter. The three side trimmer makes it possible to trim the three sides of the binding objects of different sizes without exchanging the trimming tables.

Abstract: A hole puncher formed as one piece of plastic molded into base, handle and receptacle portions hinged together by flexible, foldable joints. The one-piece plastic construction can be assembled quickly as a hole puncher by folding the portions into predetermined positions. A feature of the hole puncher is the use of a plastic locking strap connecting the handle and the base, for maintaining the handle folded over the base. Another feature is the use of translucent plastic material, enabling the user to visually check the desired alignment of pins with the paper to be punched, to assure proper location of the punched holes. The design provides an attractive, affordable and easily assembled design without sacrificing strength and durability.

Abstract: Apparatus for producing diced food product includes a endless wire mesh conveyor belt for supporting food product to be diced. In one embodiment, a plurality of high pressure water jet nozzles are spaced apart on a water manifold that extends in the longitudinal direction of the conveyor belt and is reciprocative across the conveyor belt. The jets of water pass through the product, the belt and a slotted grid matching the spacing of the water jets. In one specific arrangement, the nozzles extend over a length at least equal to twice the length of transverse movement of the manifold less the distance between adjacent nozzles, and the speed of movement of the manifold and conveyor belt are equal, whereby to produce diced food product of square configuration. In another arrangement, the speed of movement of the manifold or belt is made faster or slower than the other, whereby to produce diced product of diamond configuration.

Abstract: A piercing blade for perforating slits in a continuous tubular web of thermo-plastic material is shown. The blade is used in a machine to form individual bags from the tube by heat sealing the bottom and perforating the top of the next bag. The piercing teeth in the blade have formed in the front face a number of horizontal grooves which serve to pick up the edge of the top layer of the slit to form a burr thereon and thus separate the two plys of the tubular web, facilitating the opening of the top of the bag when it is separated from the roll of continuous tubular material.

Abstract: An apparatus for use in the design of a package including a portion having therein a recessed area adapted to house an article, the apparatus comprising: a model of the package portion, a model of the article, the article model being locatable on the package model, and structure for identifying, in two dimensions, the position and orientation of the article model on the package model when the article model is located on the package model.

Abstract: The invention relates to a device for cutting, according to a saw tooth pattern, the extremities of veneer tapes between two pairs of upper and under knives and for gluing those extremities under pressure by using i.a. a pression beam on which the necessary pressure is applied by a hammer of an oscillable press and which, for that purpose, is beared in a vertically displacable bridge, characterized in that the device comprises the following elements:(a) means for locking the hammer (13) of said press with respect to said bridge (2):(b) under and upper knives which cut the veneer tapes at different heights;(c) means for bringing said hammer (13) in its rest position when it is delocked with respect to said bridge (2);(d) a pneumatic cylinder (28) for pulling down said bridge (2);(e) means for neutralizing the pression exerted by springs on the under knives.

Abstract: In the registration of artwork panels for the manufacture of printed circuit boards, each panel is located, in turn, above two target location areas. Targets are provided upon the panel and these targets are positioned over the target location areas. With light projected from the target location areas and through the panel around the targets, the positions of the location areas and targets are monitored, and the artwork panel is moved to dispose the targets in specific locations relative to datums. The panel is then registered in position prior to a processing step, e.g. the punching-out of registration holes.

Abstract: An upper tool of a blank separating station, which is operated within a machine for producing blanks for packages in sheet material is characterized by the upper tool consisting of a rectangular board provided with a pattern of openings. A lower surface of the board bears a large number of punches which are mounted on the board by a self-locking pin arrangement that extends through one of the apertures in the board.

Abstract: A punching device is provided that includes a frame disposed on a base and a pair of wall members, a lever having one end pivotally coupled between the wall members, a block slidably retained between the wall members by two plates and having an upper end linked to the lever a recess formed in the block, and a rod having an upper end fixed to the block and including a bore in communication with the recess of the block. The rod is movable downwardly by the lever to punch holes in paper, and provision is made for the residual of the paper to move through the bore of the rod, through the recess of the block, and into an access with a removable cover. A downwardly biased foot presses against the sheet materials on the base before the rod punches through the sheet materials. The base includes two interconnected support racks which are simultaneously adjustable.

Abstract: The object of the invention is to reduce the number of the producing processes of an IC lead frame.In the present invention, a plurality of punches 17 are provided protruding from the base 16 in such a manner that their surfaces are disposed approximately radially, and the reinforcing punch 23 which connects the cutting blades 18 of the punches 17 with each other, is provided between the cutting blades 18, and protruding from the base 16.The punches 17 are integrated by the reinforcing punch 23, so that the strength of each punch 17 is improved and the number of punched holes in one process can be increased.

Abstract: A paper punch and binding apparatus has two punch mechanisms, one for punching round holes in a paper sheets stack and one for punching rectangular holes in another paper sheets stack. A single lever or crank simultaneously operates and drives a series of round end punches to shear the round holes and a punch plate with integral rectangular punch elements shear rectangular holes. A four-bar linkage connects the lever to the punch plate and the series of the punches in a manner that both the plate and punches are driven in a vertical straight line and with a greater mechanical advantage at the start and over the first increments of the punching operation. In a preferred embodiment, a binding station is provided in an apparatus base portion particularly for binding with a Douvry-type plastic resilient loops binding element. The binding station has an operating knob which operates a simple gear interconnect train for uncurling the resilient loops and allowing the punched hole stack to be inserted thereon.

Abstract: The present invention relates to an apparatus which is able to form a desired number of wells in gelatinous media, as for example agar-based media contained in dishes or plates such as the normal microbiological culture dishes or plates.

Abstract: A web severing device for providing a smooth severed edge on a moving web. The device includes a support member and a plurality of independent blade sections mounted on the support member at substantially a 45.degree. angle with respect thereto. In one embodiment, a forward portion of each of the blade sections is angled toward a center of the support member whereas in a second embodiment, the blades are alternately angled toward and away from the center of the support member. In all embodiments, the support member is selectively released toward the web, and the plurality of blade sections simultaneously engage with the web to sever the same.

Abstract: An auxiliary punching device is disclosed, which is attachable to a machine for punching holes at one given location into a stack of sheets of given size, in order to punch other holes at another given location in the same stack at the very same time as the holes are punched at the one location. This auxiliary punching device comprises an auxiliary die and an auxiliary punching tool that are attachable to the main die and punching tool of the punching machine to work in unison therewith. Both of the structural elements are very easy to adjust to fit any required positioning or configuration for the second row of holes to be punched, whatever be the size of the stack of sheets fed to the machine.

Abstract: A DIN rail cutter and punching apparatus for cutting a DIN rail to a selected length and for punching at least one mounting slot therethrough at a desired angular orientation comprises a shear for cutting the DIN rail and a punch and die set which is operatively coupled for operation in unison with the shear. The DIN rail cutter comprises a shear for cutting the DIN rail and is arranged for removably receiving a cutting die for accommodating any of a plurality of cutting dies for cutting different shapes of DIN rail. A rotating punch and die set for punching a DIN rail at any of a plurality of angular orientations comprises a punch mounting block; a punch rotatably mounted in the punch mounting block; a die mounting block and a die rotatably mounted in the die mounting block; the punch mounting block and the die mounting block are mounted for relative movement so as to advance and retract the punch into an out of engagement with the die.

Abstract: A cut and score die apparatus is provided for progressively converting a sheet of material into blanks. The apparatus includes a punching section for punching scrap material from the sheet of material to define an array of interconnected blanks arranged in a grid of rows and columns on the sheet of material. A scoring section is provided for simultaneously scoring a first predetermined pattern on a trailing portion of a first row of blanks and a second predetermined pattern on the leading portion of a second, succeeding row of blanks on the sheet of material. A blanking section is also provided for piercing the sheet of material in a predetermined pattern to cut blanks from the sheet of material without producing any additional scrap material.

Abstract: A single, fluid pressure-operated cylinder, which has a conventional slitter blade and punch releasably secured to the lower end of its piston rod, is secured to a plastic bag making machine so that the operating ends of the blade and punch project toward a stationary, horizontal support surface across which overlapping plastic webs pass during bag manufacturing. The webs are secured against movement during a slitting and punching operation by a pressure plate, which is also mounted on the piston rod for movement thereby into engagement with the plastic webs to clamp them against the stationary support surface during the initial advance of the rod. As the rod continues to advance it moves the blade and punch through the now-clamped plastic webs, after which the piston rod is retracted and the parts return to their inoperative positions.

Abstract: In a die including a cam member, which can be compactly designed in addition to the necessary function given to a cam member, in order to accomplish high quality machining without moving the cam member in a serpentine fashion, the die includes a slide cam having a slide cam base on the top of which a polyhedral guide portion is formed, the slide cam which holds and supports the polyhedral guide portion of the slide cam base being slidable along the polyhedral guide portion, and onto which machining tools such as a punch and a trimming edge are mounted, an elastic body interposed between the slide cam base and the slide cam for urging the slide cam, and a driving cam contacting the slide cam for driving the same.

Abstract: An apparatus has a base plate having a plurality of penetrating holes, a vertically movable plate slidably mounted on guide posts, and a stripper plate slidably mounted on the guide posts and hung from the movable plate. A plurality of stripper pins are vertically slidably mounted in the stripper plate. Each stripper pin is arranged to be inserted in corresponding one of the penetrating holes of the base plate. A sheet holding plate for mounting a product sheet is provided to be detachably mounted on the base plate. The stripper pins are arranged to push each molded rubber product on the product sheet in the corresponding penetrating hole so as to strip it from the product sheet.

Abstract: In a punching apparatus, a die set supports, in mutual opposition, an upper die part on which a plurality of punch pins upwardly urged by a plurality of springs are axially slidably disposed at predetermined intervals, and a lower die part formed with a plurality of holes opposing the punch pins. A device for driving the punch pins includes a plurality of drive shafts each having at least three shaft portions disposed adjacent to each other, part of the shaft portions being formed of a magnetic material and the remaining part thereof being formed of a non-magnetic material. At least two electromagnetic coils are fitted around the shaft portions of each drive shaft, and a clutch mechanism disposed on one end of each drive shaft separably couples the drive shaft with the punch pin. The driving device greatly reduces the amount of heat generated by the electromagnetic coils to allow the adoption of an air cooling system, and increases punching force to assure positive working.