Method and apparatus for printing the surface of a bag which has

Details Method and apparatus for printing the surface of a bag which has Method and apparatus for printing the surface of a bag which has

1978-12-21

1981-04-28

Crowder, Clifford D.

Printing

Special article machines

101426, 53131, 53411, B41F 1700

Patent

active

042638453

ABSTRACT:
The air in a bag which has been filled with a content is first removed by pressing to flatten the surface of the bag. The bag is then transported and supported in such a manner that it assumes an arc shape having a fixed curvature with which the convex surface of the bag is permitted to be opposed to the convex surface of a printing plate at a position just below said plate. Under these conditions, the surface of the bag is clearly printed. The apparatus for effecting the printing method of the present invention comprises a pressing device for pressing the bag, a printing plate mounted on a plate cylinder of a rotary letter press and detector for causing the plate cylinder to be rotatively driven and the rotation thereof to be stopped.

REFERENCES:
patent: 2491947 (1949-12-01), Bardash
patent: 2645870 (1953-07-01), Smith et al.
patent: 2818799 (1958-01-01), Hayward
patent: 3302599 (1967-02-01), Valyi
patent: 3659522 (1972-05-01), Dubuit

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