Systems, methods, and devices are provided for applying a perforation layout to an extruded film. The extruded film may be processed into film roll stock used to make individual perforated bags. A perforation layout is determined based on a desired, perforation design, for individual bags, and the determined, layout is applied to the film by a perforating element. A variety of different perforations are accommodated by a variable perforating machine that produces perforations of different size, spacing, uniformity, and linearity. A laser perforating element may be implemented and controlled by a programming module configured to produce a particular perforation.
B26F 1/18 - Perforating by slitting, i.e. forming cuts closed at their ends without removal of material
B26F 1/31 - Perforating by non-mechanical means, e.g. by fluid jet by radiation
B23K 26/00 - Working by laser beam, e.g. welding, cutting or boring
B29C 59/00 - Surface shaping, e.g. embossingApparatus therefor
B65B 61/02 - Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, or applying code or date marks on material prior to packaging
B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)
B23K 26/38 - Removing material by boring or cutting
B26D 5/00 - Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
2.
METHOD AND APPARATUS FOR DEBANDING A COMPRESSIBLE BUNDLE
A method and apparatus for debanding a compressible bundle. The apparatus includes an End of Arm Tooling (EAT) component which is moved vertically downward over the bundle to a position where holding arms of the EAT component are manipulated to pick up and hold the bundle. At this position, one or more indenters of the EAT component are pressed into an upper surface of the bundle form a trough in the bundle that crosses under a band which surrounds the bundle. A cutting knife assembly of the EAT component is actuated to slide linearly along a longitudinal direction of the trough to cut the band without contacting the surface of the bundle, thereby enabling the band to drop away from the bundle. As a result, the bundle can be debanded without damaging the bags.
patents