Part bottom seal of chain of gusseted bags and machine therefor

Details Part bottom seal of chain of gusseted bags and machine therefor Part bottom seal of chain of gusseted bags and machine therefor

1986-03-03

1988-08-16

Schmidt, Frederick R.

Flexible bags

Wall details

Pleated or gusseted

383 37, 383121, 493193, 493195, 493198, 493233, B65D 3020, B31B 2364

Patent

active

047640308

ABSTRACT:
A chain of bags is disclosed, with each having first and second panels and gusseted sides. The chain of bags is provided with a transverse bottom seal which in the central portion seals together the front and rear panels, and also seals together the inner portion of the gussets as well as the front and rear panels for four thicknesses being sealed. At the outer portions, there are only two thicknesses sealed together, namely, the front gussets are sealed to the front panel and the rear gussets are sealed to the rear panel. This establishes a chain of bags which may be supplied to a bag filling machine whereat conveyor belts form a nip and grip only the outer portion of the rear gussets where attached to the rear panel. By this means, the bags of a chain may readily be opened to practically full capacity and then filled. When the bag is closed and sealed, it forms a rectangular bag with square ends which may readily be palletized to form a secure and stable pallet load.

REFERENCES:
patent: 2320326 (1943-05-01), Avery
patent: 2720247 (1955-10-01), Richens
patent: 3023947 (1962-03-01), McDuffie
patent: 3321354 (1967-05-01), McCutcheon Sloan et al.
patent: 3468470 (1969-09-01), Sengewald
patent: 3772116 (1973-11-01), Schaffron
patent: 3896709 (1975-07-01), Brinkmeier
patent: 3915077 (1975-10-01), LaFleur et al.
patent: 3961743 (1976-06-01), Hollowell
patent: 3973045 (1976-08-01), Brandberg et al.
patent: 4561107 (1985-12-01), Herder

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