Abstract: Two intermittently and oscillating driven feeding rollers (2; 3) are adapted to feed a strip-shaped workpiece (63). The bottom feeding roller (2) is supported in the frame (1) of the feeding device. The upper feeding roller (3) is supported in a rocker (30). The movement of the rocker (30) is controlled by a control disk (64) through a lever and a rod arrangement (40). The rocker (30) rests at one end (33) via a pressure spring (39) against the frame (1). At the opposite end (34) the rocker (30) rest against the frame (1) via a further pressure spring (36). The rocker (30) is supported in an overhung state on a cantilever which consists of a sleeve (70), a arm (71) projecting laterally from the sleeve (70) and a shaft (72) held clamped in the arm (71). The clamping bar (46) is firmly mounted to the shaft (72).

Abstract: The lever of a mechanism for driving a sheet feeder is guided for linear longitudinal movement in a guide member. The guide member is supported rotatably in a bearing pedestal, which is height adjustable. The lower section of the lever is shaped as a hollow profile having inner sliding surfaces. A slide member is located at the sliding surfaces. The slide member receives a pivot, by which a shaft is driven oscillatingly. The slide member is located for longitudinal movement at the center axis of the lever and, accordingly, the lever is not subjected to any torsional loadings and the entire apparatus can be made relatively narrow. This decreases elongations during the operation of the apparatus considerably.

Abstract: A crank drive for the material feeder of a machine tool is constructed so that the position of the crank pin along a line of action thereof, viewed in a position/time curve of the crank pin, is a modified sine curve, which curve is modified in that the peaks of the sine curve are flattened. To achieve this, the crank pin is adjustable relative to a crank disc on the one hand by a basic eccentricity setting device and on the other hand by an eccentricity correcting device. The eccentricity correcting device comprises cams mounted stationarily on the bearing arrangement of the crank disc and a cam follower engaging the cams. The cam follower acts on a main slide movably guided on the crank disc. The basic eccentricity setting device is effective between the main slide and a secondary slide carrying the crank pin. The secondary slide is guided on the main slide.

Abstract: A gripper feed devices comprises a housing, first and second tension grippers, first and second toothed rods fixedly connected to the first and second tension grippers, and a rotatable pinion meshing with the toothed rods for converting the rotational movement of the pinion into linear, symmetrical movement of the tension grippers in opposite directions. The pinion is cyclically driven, via a main shaft and a crank disk mounted on the main shaft, by two piston/cylinder arrangements connected at different points on the crank disk. The two piston/cylinder arrangements are designed to operate alternately and in opposite directions, thus imparting a cyclical rotation to the pinion. An adjusting disk mounted on the main shaft and an adjusting sled to which the piston/cylinder arrangements are connected are also provided to vary the stroke length of the piston, and thereby the extent of linear movement of the tension grippers.

Abstract: A roll feed apparatus in which a plate material is held in a pair of rolls and fed intermittently, in a predetermined length at a time, by the oscillated operation of the rolls, the distance between the rolls is adjusted by a material thickness adjusting mechanism, the power of the rolls for holding the material is adjusted by a holding power adjusting mechanism, and the length of each feed of the material is adjusted by a feed length adjusting mechanism. The material thickness adjusting mechanism, the holding power adjusting mechanism and the feed length adjusting mechanism are automatically numerically controlled by an electrical control system without direct manual operation.

Abstract: A pair of rollers receives the stock between them and are movable laterally in unison to advance the stock gripped between them in a feeding movement. A slide block is slidably carried by a disk and is provided with a coupling that is offset from the axis of the disk. The coupling is connected to the pair of rollers so that rotation of the disk will move them in their lateral movement. The length of the feeding movement is adjusted by moving the slide block relative to the disk to adjust the distance between the coupling and the axis of the disk. The slide block is provided with a measuring surface that is located so that the distance from the measuring surface to the reference surface corresponds to one-half the length of the feeding movement. The slide block is clamped in position by a locking plate that is slidably supported by the disk.

Abstract: A roll feed apparatus has first and second rolls for gripping a plate when rotated in first directions and moving from each other when rotated in second directions, and first and second brake pieces for fixing the plate during rotation in the second direction. A pivot body has support portions along its length for rotatably supporting a first roll shaft at opposite ends. A pair of pivot shafts parallel to the first roll shaft are rotatably connected to the pivot body and a housing and eccentric with respect to each other. First and second adjusting arms are fixed to the shafts; third and fourth adjusting arms are pivotally fitted to the support portions and support the first brake piece. A first adjusting device with first and second links coupled to the first and second adjusting arms moves portions of the first roll and first brake piece located next to first and second arms towards or away from the second roll and the second brake piece by pivoting these arms.

Abstract: An apparatus for adjusting a stroke of a stroke material feed mechanism used in a punch crank press comprises a throw member fixedly attached to the crank shaft of the press for joint rotation therewith. A crank pin means which provides for reciprocal movement of the feed block of the feed mechanism is attached to the throw member. Motor means displaces the crank pin means relative to the throw member to change the eccentricity of said crank pin means relative to the axis of the crank shaft whereby the amount of stock length advanced into the working area of the press is changed.

Abstract: A pneumatic feeder is disclosed having twin feed slides axially reciprocable in side by side relation along parallel axes for intermittently advancing strip stock to a downstream machine for further processing. Each feed slide has clamps which serve to advance the stock with the traveling slide clamps activated and the clamps of the other slide being deactivated during its idle return movement. Each feed slide additionally has a rotatable crank mechanism and a single acting power cylinder associated therewith for providing a primary motive force in a stock advancing direction in cooperation with the associated crank mechanism. The crank mechanism serves both to trigger actuation of the driving force of the power cylinder to advance its feed slide and additionally provide harmonic deceleration of its feed slide under high rates of feed to ensure precision termination of the advancing feed slide to positively limit its feed stroke.

Abstract: A roll feed apparatus having a first roll and a second roll for intermittently clamping therebetween and feeding sheet material. An adjusting device is provided for adjusting the gap between the first and second rolls and includes a pivot member adapted to cause, when it pivots, the first roll to more towards and away from the second roll. First and second braking members temporarily fix the sheet when it is unclamped from the rolls. The second braking member is carried by a braking position adjusting arm disposed between the pivot member and the path of feed of the sheet. The adjusting arm is pivotally carried by the pivot member and arranged such that an imaginary plane connecting the portions of the first roll and the second braking member closest to the path of feed of the sheet is moved, when the pivot member pivots over a predetermined angle, substantially in parallel with the path of feed of the sheet.

Abstract: A roll feed apparatus having a first roll and a second roll for oscillatory rotation in opposite directions such as to intermittently feed a sheet clamped therebetween. The roll feed apparatus comprises a pivot member having one end fitting on a pivot shaft extending from the housing of the apparatus substantially in parallel with the first roll shaft and the other which is free, the pivoting member being mounted at its portion between the one and the free ends on a first roll shaft, the pivot member being adapted to cause, when it pivots, the first roll shaft and the first roll to move towards and away from said second roll, a first adjusting device for adjusting the force by which the first roll is urged towards the second roll is adjusted, and a second adjusting device for adjusting the gap between the rolls in accordance with the thickness of the sheet to be fed. The first and second adjusting devices are operable independently of each other.

Abstract: A roll feed apparatus for feeding a sheet material successively to different working stations. The apparatus includes an oscillation driving device, a main sector roll integrally carried by a main roll shaft and adapted to be oscillatorily driven by the oscillation driving device, and a sub-sector roll integrally carried by a sub-roll shaft extending in parallel with the main roll shaft. The sub-sector roll is adapted to cooperate with the main sector roll in clamping a sheet material therebetween and feeding the same.

Abstract: A stagger feeder for a downstream machine such as a power press and the like is disclosed having a structure particularly suited to provide an actual linear path of movement of an activated feed head identical to the effective feed stroke of the material being moved by that feed head. Two movable feed heads are linked together mechanically, and the motion of these feed heads is controlled by a crank mechanism actuated by an indexing mechanism to trigger a pre-pressurized drive cylinder to effect feed stroking. Simplified adjustment of the effective length of the feed stroke is provided by the direct action stagger feeder of this invention to readily accommodate different size blanks in the downstream machine.

Abstract: A roll feed apparatus has first and second rolls designed for cooperation with each other in clamping therebetween a sheet material such as to intermittently feed the same. The apparatus also has a release/brake device having first and second braking members which temporarily fix the sheet when the sheet is unclamped by the first and second rolls. The apparatus further has an adjusting device including a pivot member adapted to move, when it pivots, the first roll towards and away from the second roll thereby adjusting the gap between two rolls. The release/brake device has a braking position adjusting arm extending in the direction of feed of the sheet and pivotally secured to the pivot member at a position adjacent the path of feed, and an adjusting plate pivotally secured to the pivot member. The second braking member is provided on one end of the braking position adjusting arm.

Abstract: A roll feed apparatus for intermittently feeding a sheet-like blank material to successive work stations has a pair of sector rolls adapted to be driven by an oscillation driving device in synchronism with each other such as to clamp the material therebetween and feed the same intermittently in one direction, by virtue of a driving connection device which drivingly connects the rolls to the oscillation driving device. The apparatus further has a roll release device adapted to move the rolls away from each other when the rolls are oscillated in the directions counter to the feeding directions thereby releasing the sheet-like blank material from the clamping force.

Abstract: The invention relates to a gripper or clamp feed advance mechanism for sheet metal bands or profiled forms on presses, having two feed advance clamps or grippers on the feed-side of the press and having a spacing therebetween in the direction of adjustment, whereby the feed advance and return stroke may be carried out between two press strokes. The purpose of the invention is a feed advance mechanism which makes possible the easiest adjustment of the feed advance path and the direction as well as of the spacing between the feed advance clamps or grippers, with a minimal feed advance force and practically any desired material dimension. It is intended that the spacing between the feed advance clamps or grippers (5) which determines the advance and return stroke, is achieved synchroneously through the adjustment of the crank radii (13) of the crank drive (10, 21, 23) by a common adjustment member (12).

Abstract: An improvement in a strip feeder for feeding a continuous strip of sheet material to a punch press, for example. The feeder includes a drive roller segment and an idler roller. The drive roller segment is driven in oscillating fashion by the punch press through a cam oscillator drive. A lever assembly connects the cam drive with the drive roller segment shaft. The lever assembly includes a lever which pivots about a point adjustable along the length of the lever. This adjustment, which can be made while the feeder is in operation, is effective to vary the oscillating travel of the feed roller segment and, accordingly, the length of strip which is fed.

Abstract: This invention relates to a gripping feeder for an intermittent feeding of strip or wire stock in presses, stamping machines or similar machines. It is an object of the invention to provide such gripping feeder which permits a change of the stroke length to be effected from the outside while the machine is in operation and permits such change to be effected manually or by means of an adjusting motor and also permits an automatic adaptation of the feeding and retaining grippers to the thickness of the strip or wire stock to be fed. This is accomplished in that the carriage carrying the feeding gripper is adapted to be driven from the main drive of the machine via a feed rocker, which extends transversely to the direction of travel of the carriage and is fulcrumed on a slider, which is slidable along a rail that extends transversely to the direction of travel of the carriage so that an adjustment of the slider along said rail will result in a change of the stroke length of the carriage.

Abstract: A roll feed apparatus for feeding a sheet material successively to different working stations. The apparatus includes an oscillation driving device, a main sector roll integrally carried by a main roll shaft and adapted to be oscillatorily driven by the oscillation driving device, and a sub-sector roll integrally carried by a sub-roll shaft extending in parallel with the main roll shaft. The sub-sector roll is adapted to cooperate with the main sector roll in clamping a sheet material therebetween and feeding the same.

Abstract: An input shaft of a press feed is rotated at a preselected speed and is drivingly connected to a cam that rotates the input shaft. Continuous rotation of the cam is converted to oscillating rotational movement of a cam follower through a preselected angle of rotation. The cam follower is nonrotatably connected to an output shaft that is connected by an adjustable drive link and gear arrangement to a driven feed roll. Oscillating rotational movement of the output shaft is transmitted to the driven feed roll to advance the driven feed roll in contact with the strip material through a preselected degree of rotation corresponding to a preselected feed length of the strip material to the press. The end of the drive link adjacent to the output shaft is movable relative to the output shaft.

Abstract: Sheet feed apparatus for intermittently advancing a sheet, such as a thermoplastic sheet including a frame, sheet engaging mechanism reciprocally mounted on the frame for intermittently advancing the sheet, mechanism for reciprocally moving the sheet engaging mechanism in a to-and-fro path of travel including a stationary shaft and a rotatable shaft concentric with the stationary shaft, a primary crank arm fixed to the moveable shaft for rotation therewith, a secondary crank arm rotatably mounted on the primary crank arm for rotation relative thereto, and mechanism coupling the primary crank arm and the secondary crank arm for rotatably driving the secondary crank arm in a direction opposite the direction of rotation of the primary crank arm.

Abstract: The invention relates to a mechanism for adjusting the feed length of a rack and pinion roll feed mechanism of the type generally used for feeding strip stock into presses. The feed length adjusting mechanism comprises a hub member connected to the press shaft, a throw block connected to the hub, and a slide rotatably connected to the connecting rod of the rack and pinion drive for the feed. A slide is locked to the block by means of a piston and cylinder lock mechanism, and a lead screw is threadedly connected to the slide and rotated by a bidirectional pneumatic motor mounted to the block, whereby rotation of the lead screw causes the slide to translate within the slideway. This changes the length of the eccentric connection between the rotating block and connecting rod thereby proportionately changing its stroke and the amount of strip stock which is fed into the press during each cycle of the feed mechanism.

Abstract: In apparatus for feeding stock including a feeding slide driven for reciprocal motion within a linear path between two terminal positions by a crank mechanism, an auxiliary device is provided which periodically superimposes motion characteristics on the movement of the feeding slide caused by revolution of the crank mechanism at least in the regions of the terminal positions of the linear path of the feeding slide.

Abstract: A wire insertion apparatus particularly for forming presses and the like comprising at least one pair of insertion rollers between which a wire or rod is periodically advanced by a predetermined insertion length, a crank and connecting rod mechanism connecting at least one of the insertion rollers to a drive shaft for producing a periodic angular movement of the insertion rollers, the mechanism comprising an intermediate lever member pivotally mounted on an axis, first and second linkage rods connecting the intermediate member respectively with an eccentric on the drive shaft and an eccentric mounted on one of the insertion rollers so that rotation of the drive shaft produces angular movement of the insertion roller in response to pivotal motion of the intermediate lever member, and means for shifting the pivot point of one of the linkage rods so as to change the distance between the pivot axis and that rod and thereby change the degree of angular movement of the insertion rollers.

Abstract: In a hot forming machine in which molding means deform a thermoplastic foil band and cutting and stamping means further process the deformed foil band. A photocell is adapted to scan marking indicia on the foil band and to adjust a lengthwise adjustable connecting member in accordance with such scanning. The connecting member forms part of an advancing arrangement for the transported foil band. This advancing arrangement includes a swing arm pivotally mounted in the machine; a first shaft mounted on the swing arm in proximity of the free end thereof; and an eccentric rigidly secured to the first shaft and pivotally connected to the connecting member which is also pivotally connected to the swing arm.

Abstract: Apparatus for forming honeycomb material comprising a bonding station for continuously securing together an even numbered plurality of superimposed webs of flexible sheet material, such as paper, on lines extending longitudinally of the webs and spaced transversely across the webs at substantially equal intervals to form a composite web. A second adhesive station applies stripes of adhesive on an outside face on one of the webs constituting one outside face of the composite web, these outer stripes extending longitudinally of the composite web and each stripe being positioned intermediate the lines on the inside face of the one web securing this one web to the remaining webs of the composite web. A web feed is intermittently operable in cycles to feed forward an increment of the composite web beyond a reference line a predetermined distance and an intermittently operable drive drives the feed through a cycle to feed forward this increment of predetermined length with a dwell between successive cycles.

Abstract: High production rates and decreased wear and tear and stress on parts are obtained in a bag fabrication machine with the web fed intermittently by respective bag lengths, for operations such as perforating, transverse severing or welding with the web halted.A sector plate is oscillated between two extreme positions faster in one direction than in the other by a flywheel-carried crank pin orbiting about an axis eccentric from the plate axis; the pin engaging a block sliding in the plate radially of its axis. The plate motion is applied as input to an electrically operated clutch and brake unit and the output is applied to web advance rolls. Switches on the slide block, actuated at the extreme sector positions, control the alternating clutch and brake engagement to drive the rolls for web feed during the slower sector motion of relatively longer duration; and also declutching with braking to halt the web precisely, for and during a faster sector plate return motion.

Abstract: A tape feeding apparatus having a rotary member for feeding a tape which is drivingly connected with rotary driving means through at least two link mechanisms to be rotated at different speeds and with a phase difference so that one of the link mechanisms for a low speed rotation is set in operation just before another enters its dead point. With this structure, intermittent tape feeding can be effected at a high speed, while allowing quick stopping of the rotary member at a required position.

Abstract: A feeding mechanism for feeding material to a machine comprising a supporting structure, a drive roll rotatably mounted on the supporting structure, a second roll rotatably mounted on the supporting structure, a drive lever mounted for pivotal movement in both directions about a pivotal axis, a one-way clutch for coupling the drive lever to the drive roll, an adjustable stop for limiting the pivotal movement of the drive lever in one direction, and a resilient member for driving the drive lever in said one direction.