Abstract: A slitter mechanism for use in a double fold bottomer apparatus employed in making bags from starting flush cut tubes is described which gives precise, high speed side marginal tube slitting in order to permit subsequent downstream gluing and folding operations. In preferred forms, the slitter mechanism includes a bag-end separating assembly having a vacuum manifold and a cooperating adjacent deflector bar serving to separate end portions of the sidewalls of a moving tube. A sequentially rotatable blade is also provided which first enters the open end of the moving tube between separated wall portions, overtakes and slits the leading side margin of the tube, and then stops with a trailing slitting edge situated within the tube open end; subsequent bag movement causes the trailing tube side margin to engage and be slit by the stationary blade edge.

Abstract: A continuous tag feeding and cutting apparatus for cutting a continuous tag strip into proper length tags. A first feeding mechanism feeds the strip of tags past the cutting mechanism to a second feeding mechanism, and a sensor halts the first feeding mechanism each time a sufficient length of the tag strip has been fed past the cutting mechanism. The cutting mechanism includes a rotary blade which is driven through one rotation cycle each time a length of tag strip is fed therepast by the first feeding mechanism. A second feeding mechanism located past the cutting mechansim is engaged with the tag strip for feeding a tag cut from the strip during one rotation of the blade to storage after the tag has been cut from the strip. The second feeding mechanism includes a driving roller which is driven to rotate along with the rotary blade and includes a driven roller which is engageable with the driving roller to engage the tag strip.

Abstract: An interleaver for providing a sheet of paper for each piece of meat moving along a conveyor includes a trap door conveyor section for removing undersized pieces in response to measurements made by photo optical sensors. A knife crushes paper from a paper roll to sever a web of the paper into the sheets. A conveyor pulls the severed sheets from the knife, and air blower guides the web to the knife and prevents the next leading edge of the web from sticking to the knife. Two paper rolls are provided, one roll operating while the other roll stands by. Photo optical sensors monitor the feed from the rolls and switch the feed to the stand by roll if there is an interruption in the feed from the first roll. In addition, both rolls may operate together. A brake is provided for each paper roll, and each paper roll is fixed to a spindle which provides for adjustment of the position of the paper roll axially on the spindle.

Abstract: A method and apparatus are disclosed for skiving and hemming one or more edges of a paperboard web or blank to improve the sealing qualities of a container made from the paperboard. The paperboard is skived twice generally parallel to its edge, once to define an oblique surface and once to make a flat skived surface. The latter is folded over the former and heat-sealed to a heat sealable material adjacent the skived region, defining a wedge-shaped edge portion. The folded over part is preferably ironed to produce a substantially flat sheet, and the wedge-shaped edge is preferably reshaped at some point in the process to make the entire folded over surface substantially flush with the unskived surface to which it is sealed. The flat skived surface is preferably made by a milling procedure in which the milling teeth strike the material while moving in a direction opposite to that of the motion of the material.

Abstract: A rotary punch device for making window cut-outs in envelopes and cardboard oxes, with a clamping device for clamping a metal foil having a cutting edge etched out of the foil material. Vacuum bores in the cylindrical surface of the rotary punch retain the material for treatment in position while the punched-out portion of the window is initially also retained by a vacuum and blown away by an air blast on completion of the punch operation.

Abstract: A holder mounting a plurality of crimp blades for crimping of a moving web includes a cylindrical body having a curved outer surface, and eight slots defined in the outer surface. A crimp blade is secured within each of the slots such that rotation of the body causes the blades to crimp a web moving therepast. The diameter of the body and the positions of the blade mounting slots on the surface thereof are selected so that with the blades mounted to the body, rotation thereof causes crimps to be applied to the moving web with spacings thereon between successive crimps defining a repetitive pattern of substantially 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0 and 3.0 inches (5.08, 5.08, 5.08, 5.08, 5.08, 5.08, 5.08 and 7.62 cm).

Abstract: A crimp blade holder for attachment to a rotatable shaft for removably mounting a plurality of crimp blades includes a body in which first and second cylinder portions are joined together at an end face of each, such that the portions are disposed along a common axis. A hole extends axially through the body, the shaft being insertable through the hole. A plurality of slots are arranged about the periphery of the first portion in a spaced relationship for removably inserting one of the crimp blades into each of the slots. Additional slots are arranged about the periphery of the second portion, in a second, distinct spaced relationship, also for the removable insertion of one of the crimp blades into each of the slots. The crimp blades are secured within either of the groups of slots, and the body is secured to the shaft at a selected one of a plurality of positions along the shaft. A method of using the described blade holder is also disclosed.

Abstract: In apparatus having a pair of spaced apart cylinders rotatable on respective axes that are substantially parallel and lie in a common plane, each cylinder has at each end thereof a smaller diameter concentric bearer ring. Each bearer ring on each cylinder is adjacent to a bearer ring on the other. For each bearer ring there is a roller supporting member that is movable in directions parallel to said plane and transverse to said axes, each roller supporting member being adjacent to its bearer ring, between that bearer ring and an adjacent roller supporting member. Two rollers on each supporting member, at opposite sides of said plane, rollingly engage its bearer ring. An adjustable spacer member reacting between adjacent supporting members substantially on said plane hold them spaced apart by an adjustably variable distance that determines the distance between the cylinders.

Abstract: A web of flattened, tubular, heat-sealable bag material travels above and at the speed of a moving belt. Above the belt is a seal shaft which rotates a heated seal bar. The working edge of the seal bar may be adjusted inward and outward relative to its shaft. The edge causes a transverse seal to be made on the web at intervals. A rotary perforating knife is driven at the same speed as the seal shaft and, at a subsequent station, perforates the web proximate the seal. The linear speed of the edge of the seal bar is at the speed of the belt at the time of sealing contact (about 65.degree.). The speed of the seal shaft for the remaining 295.degree. is adjustable and thereby the distance between seals and perforations is adjustable.

Abstract: Rotary slitting apparatus for slitting paperboard material including a pair of coacting knife holders for mounting on parallel adjacent rotatable shafts, such holders having thin flexible annular slitting blades clamped thereon at a slight angle to a plane normal to the axis of the shafts so that the blades overlap slightly to provide scissors-action cutting of paperboard material passed between the heads.

Abstract: At least three crosscutters for a web of corrugated board include a first crosscutter for the original width of the web and second and third crosscutters for crosscutting slit subwebs having reduced widths as compared to the original web width. A module formed by the second and/or third crosscutters with less power and drive requirements is located in the same vertical plane as the crosscutter rolls of the first crosscutter or laterally displaced therefrom.

Abstract: In an apparatus for forming and separating the side edges of plastic bags of the type which have opposed interlocking closure strips, an intermittent transport device transports a half-tube of thermoplastic sheeting to a welding device. The sheeting is stopped while welding is performed. At a milling station upstream of the welding device, a milling apparatus is actuated while the half-tube is stopped to mill off a short length of each of the opposed closure strips at a position which coincides with the position at which welding will later be performed.

Abstract: A rotary die cutting and scoring machine including a free wheeling resiliently covered anvil roll, an adjustable pusher having a velocity profile insuring that the velocity of the leading edge of the fed sheets matches the peripheral speed of the cutting roll, guides for guiding the side edges of the fed sheets maintaining their guide services parallel to the direction of feed and a reciprocating cutting tool for removing a selected portion of the resilient coating on said anvil roll to produce a fresh anvil surface. The machine also includes a support plate located on the reciprocating pusher to insure accurate feeding of warped sheets.

Abstract: A corrugated paperboard slitter has at least one rotatable shaft with a plurality of slitter or scorer heads slideably received on the shaft. A means is provided adjacent each of the shafts for positioning heads individually or as a group by way of a shifter. A mechanism moves the shaft between an operative slitting or scoring position and an adjusting position wherein the heads can be engaged by the positioning means.

Abstract: There is disclosed a positioning head for cutting and marking apparatus, whereby when a plurality of cutter wheels or marking-off wheels are successively moved into place, the positioning head or heads which have already been positioned in place can be locked in place. The positioning head comprises, within a housing mounted on the boss of the cutter or marking-off wheel and slidably fitted on two guide bars, a feed gear threadedly engaged with a feed screw shaft which is extended through the housing, an input gear slidably mounted on an input shaft which is extended through the housing, a group of driving gears for transmitting the rotation of the input gear to the feed gear, and a clutch for connecting and disconnecting the driving force transmitted to the feed gear from the input gear, whereby after the positioning head has been put in place, the clutch may be disengaged so as to lock the positioning head in place while any other positioning head is being moved.

Abstract: A slitter-scorer apparatus comprises upper and lower slitter-scorer units which are disposed in one above the other relationship and are vertically movable respectively. The apparatus can immediately change slitting and scoring operations along the flowing direction of long and flat materials, which are fed continuously, without any reduction of the flowing speed of the materials, and the operations can be performed on the materials which flow along an approximately straight line, while the total length of the slitter-scorer apparatus is shortened to the upmost.