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US 4,055,034 AGranted
Apparatus for compressing and packaging stacks of flat superposed sheet articles
AssigneeWindmoller & Holscher
InventorFriedhelm Brinkmeier
Life of this patent
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AssigneeWindmoller & Holscher
InventorFriedhelm Brinkmeier
Estimating the term…
Apparatus for compressing stacks of flat superposed sheet articles such as bags and enveloping the stacks in packaging film comprises a pressure chamber through an inlet aperture of which each stack is lifted by a pressure ram, together with a packaging film that initially spans the inlet aperture and comes to lie along the top and sides of the stack after the latter has been inserted in the pressure chamber. Following compression of the stack between the ram and a removable backing member at the top of the chamber, a reciprocatable push member having one end disposed adjacent the inlet aperture executes a forward stroke to cover the underside of the stack while the ram is laterally retracted, whereby the enveloped stack is supported by the push member on termination of its forward stroke. Welding means for joining the ends of the enveloping film co-operate with the push member, which comprises a frame and a plurality of parallel rollers freely rotatably mounted in said frame. Means for lowering the other end of the push member during or after its return stroke enable said push member additionally to act as a roller ramp for withdrawing the enveloped stack supported thereby.
Apparatus for compressing and packaging stacks of flat superposed sheet articles, comprising a pressure chamber having an inlet aperture, said stacks being successively insertable in said pressure chamber through said inlet aperture, a vertically reciprocatable pressure ram for lifting each stack into said pressure chamber and pressing same against a removable backing member at the top of said chamber, means for spanning packaging film across said inlet aperture whereby said film is carried into said pressure chamber together with each lifted stack to cover the top and two sides of said stack, a transversely reciprocatable push member disposed with one end adjacent said inlet aperture of said pressure chamber for covering the underside of said stack with said film on a forward stroke, whereby to envelop said stack with said film, said ram being laterally retractable along said underside as said push member executes said forward stroke, whereby said enveloped stack is supported by said push member on termination of said forward stroke, welding means for joining the ends of said enveloping film to form a sleeve upon termination of said forward stroke, said push member comprising a frame and a plurality of parallel rollers freely rotatably mounted in said frame, and means for lowering the other end of said push member during or after its return stroke, whereby said push member additionally acts as a roller ramp for withdrawing the enveloped stack supported thereby.
Dependencies are inferred from the claim text.