Manufacturing container or tube from paper; or other manufacturi – With cutting – breaking – tearing – or abrading – And with bending
Patent
1994-03-31
1995-07-04
Lavinder, Jack W.
Manufacturing container or tube from paper; or other manufacturi
With cutting, breaking, tearing, or abrading
And with bending
453367, 83620, 83660, B31B 114, B31F 100
Patent
active
054295777
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. The rotary die apparatus may and customarily would include, in addition to the aforesaid perforating rule members, cutting die members, and product and/or scrap ejection members.
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Geer Jeffrey A.
Simpson Jack R.
Container Graphics Corporation
Lavinder Jack W.
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