Method and apparatus for sticking down fillet seam on a package

Details Method and apparatus for sticking down fillet seam on a package Method and apparatus for sticking down fillet seam on a package

1976-04-08

1978-03-21

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

53375, 156227, 156290, 156320, 156497, 156498, 156499, B65B 720, B65B 5110, B65B 5132

Patent

active

040802370

ABSTRACT:
A method for flat pressing and sticking down of a fillet seam of a roof-shaped folding closure of a package whose outside surface is provided with a thermoplastic material, comprising transporting the package in a direction transverse to the fillet seam, heating a first area of the side surface of the fillet seam rearward of the seam relative to the direction of transport and heating a second area of the outside surface of the package complementary with the first area, and transporting the heated package past a stationary member positioned so as to press the fillet seam and cause it to stick down to the outside surface of the package. A third and fourth area respectively on the side surface and on the package and respectively spaced from the first and second areas can also be heated to form two spaced stuck down areas. By pulling upward therebetween, the seam can be raised for opening the package. A corresponding apparatus is provided and the stationary member may have a leading inclined portion so as to effect the pressing down progressively. Means may also be provided to cool the stationary member and set the sticking down.

REFERENCES:
patent: 2377103 (1945-05-01), Pittman
patent: 2444143 (1948-06-01), Palmer
patent: 2695745 (1954-11-01), Dixon
patent: 3263391 (1966-08-01), Wallsten
patent: 3380229 (1968-04-01), Nelson
patent: 3562920 (1971-02-01), Vuilleumier et al.
patent: 3610114 (1971-10-01), Kaminsky
patent: 3751876 (1973-08-01), Oakley et al.
patent: 3777448 (1973-12-01), Howe

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