Vertical form, fill and seal packaging machine with improved...

Details Vertical form, fill and seal packaging machine with improved... Vertical form, fill and seal packaging machine with improved...

B - Operations, Transporting

65

B

156/21

B65B 9/02 (2006.01) B65B 9/20 (2006.01) B65B 9/22 (2006.01)

Patent

CA 1038277

ABSTRACT A package making machine of the vertical form, fill and seal type has a tube former for re- ceiving packaging material in thin flat strip form and for juxtaposing opposite side edges thereof in parallel vertically extending and overlapped rela- tionship to provide a depending tube open at the top. A product dispenser discharges measured quan- tities of product to the tube interior space, a lower end portion thereof being sealed transversely by an end sealing apparatus. Tube advancing means may comprise intermittently operable vertically ex- tending vacuum belts or, alternatively, the end sealer may be reciprocated vertically to draw the strip material downwardly through the former. At a longitudinal seal sealing station beneath the form- er a vertically elongated sealing bar moves to engage and to seal the overlapped longitudinal edges of the tube. A sealing back-up bar within the tube is pivotally supported at its mid-point by a depending support member and freely adjusts angu- larly to provide precise parallelism and uniform pressure distribution between and throughout the length of the sealing and back-up bars. Narrow elongated tube spreaders depend within the tube to maintain the tube open in cooperation with the back-up bar and its support member, a relatively unobstructed product fall space thus being provided.

273082

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