Apparatus for making bags of thin synthetic-resin film

Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container

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Details

493194, 493196, 493926, 156510, B31B 2314

Patent

active

045498776

ABSTRACT:
The stacker provided in the stacking station immediately downstream of the cutting station of the bag making apparatus includes a transversely reciprocal needle bar provided with a plurality of needles including at least one heated blocking needle and a transversely reciprocal stripper bar through which the needles engaged. The upstream end of each bag blank is pierced by the needles as it is cut off the tube, with the downstream portion of each bag blank lying on one of the conveyor platforms. Periodically the stripper bar is moved upwardly to strip an entire stack of bag blanks off the needles. A flattening device having flattening elements engages each of the bag blanks as it cut free from the tube and presses it flatly down against the stack on the platform. A gripper carriage is displaceable in and against the direction and has a holding element displaceable vertically toward and away from the conveyor so that this holding element can press the stack down against the conveyor as the conveyor is stepped to move this stack down to a punching station where a punching or perforating operation can be carried out on the stack of bag blanks.

REFERENCES:
patent: 1735609 (1924-11-01), Frederick
patent: 2667019 (1954-01-01), Feyrer
patent: 3493450 (1970-02-01), Judge, Jr.
patent: 3893382 (1975-07-01), Bosse et al.
patent: 3970508 (1976-07-01), Gossie
patent: 4083747 (1978-04-01), Rochla
patent: 4268346 (1981-05-01), Achelpohl
patent: 4308021 (1981-12-01), Achelpohl
patent: 4395252 (1983-07-01), Lehmacher

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