Method of making and seam sealing a paper container

Details Method of making and seam sealing a paper container Method of making and seam sealing a paper container

1979-12-10

1981-08-11

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Rigid container

493110, 493149, 493328, B31B 1774

Patent

active

042831890

ABSTRACT:
Forming electric field in and out of the vertical overlap portion, bottom peripheral joint portion and top peripheral rolled portion of a paper cup of paper or like material lined with a laminate, supplying charged powder particles in the space of said formed electric field to powder coating on said portions and with subsequent heat treatment, sealing layers are formed on said portions to become water tight; providing outside electrodes at the outside of said vertical overlap portion and folded portions and providing opposed electrodes in the inside of the paper container, providing a powder supplying means for blowing powder to said sealed portions and masking means for masking the portions not powder coated to securely seal said vertical overlap portion and folded portions.

REFERENCES:
patent: 3279937 (1966-10-01), Lopenski
patent: 3891135 (1975-06-01), Szatkowski
patent: 4025660 (1977-05-01), Crose et al.
patent: 4180844 (1979-12-01), Peck

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