Process and apparatus for the sealing of paper sheets

Details Process and apparatus for the sealing of paper sheets Process and apparatus for the sealing of paper sheets

1989-10-11

1992-05-26

Gallagher, John J.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

156209, 156227, 1563088, 493264, 493328, 493394, B31B 2126

Patent

active

051163020

ABSTRACT:
In the sealing of paper sheets, particularly envelopes, such as for example self-enveloping forms, by knurling of the edges to be joined together, the preliminary moistening of the same edges is provided, which leads to a seal tight closure or sealing.

REFERENCES:
patent: 1944794 (1934-01-01), Klinger
patent: 2198460 (1940-04-01), Rickard
patent: 2834809 (1958-05-01), Schutte et al.
patent: 3300368 (1967-01-01), Cooper et al.
patent: 4074959 (1978-02-01), Curry et al.
patent: 4483728 (1984-11-01), Bauernfeind
patent: 4718883 (1988-01-01), Schmidt
Casey, Pulp and Paper, 1952.

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