Envelope blank forming machine

Details Envelope blank forming machine Envelope blank forming machine

1991-05-23

1992-03-31

Kisliuk, Bruce M.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493232, 493237, 493239, B31B 2314, B31B 4114

Patent

active

051003716

ABSTRACT:
An envelope blank forming machine for forming generally rectangular booklet envelope blanks and generally diagonal envelope blanks on the same machine includes a pair of removable turnbars, adjustable pull rolls and an adjustable cutoff device. Preselected adjustment of these components provides a generally rectangular blank or a generally diagonally shaped blank. Retractable trim devices are provided in cutting relation with the blank when diagonal blanks are being formed. Seal flap cutters and first and second flap cutters are provided to form the booklet seal flap and bottom flap on the booklet envelope blank. These cutters are removed and replaced with seal flap corner cutters, bottom flap corner cutters and diagonal trim cutters when generally diagonal envelope blanks are being formed.

REFERENCES:
patent: 2694351 (1954-11-01), Winkler et al.
patent: 2951408 (1960-09-01), Novick
patent: 2991679 (1961-07-01), Moran
patent: 3935799 (1976-02-01), Stemmler et al.
patent: 3954213 (1976-05-01), Andersen

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