Control for bag making machine

Details Control for bag making machine Control for bag making machine

1976-06-04

1978-03-07

Coan, James F.

53 28, 53180M, 53182M, 93 33H, B31B 2360

Patent

active

040773086

ABSTRACT:
Apparatus for making a succession of bags from a web of sheet material which has been printed with a series of spaced parallel bands of heat activatable adhesive located at intervals corresponding to the lengths of the bags to be made wherein the web is formed about a mandrel into a tube and advanced therealong to sealing instrumentalities situated forwardly of the mandrel in the direction of movement, a pair of endless belts paralleling the mandrel for advancing the tube along the mandrel toward the sealing instrumentalities and a detector responsive to the presence of a band of adhesive on the web and located at a place in the path of movement of the web which corresponds to a whole number of bag lengths from the sealing instrumentalities which controls the feeding means so as to feed one bag length at a time relative to the sealing instrumentalities.

REFERENCES:
patent: 2200971 (1940-05-01), Sonneborn et al.
patent: 2214593 (1940-09-01), Mustin et al.
patent: 2276282 (1942-03-01), Bindszus
patent: 3015922 (1962-01-01), Frank et al.
patent: 3057128 (1962-10-01), Gerhauser
patent: 3374602 (1968-03-01), Hamilton
patent: 3557525 (1971-01-01), Bauder

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