Apparatus for compressing and packaging stacks of flat superpose

Details Apparatus for compressing and packaging stacks of flat superpose Apparatus for compressing and packaging stacks of flat superpose

1977-02-07

1977-10-25

McGehee, Travis S.

Package making

With cover-adjunct application or formation

B65B 6302

Patent

active

040550346

ABSTRACT:
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.

REFERENCES:
patent: 3650087 (1972-03-01), Brinkmeier et al.
patent: 3747295 (1973-07-01), Brinkmeier

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