Method for making sacks which are open at one end and comprise a

Details Method for making sacks which are open at one end and comprise a Method for making sacks which are open at one end and comprise a

1979-09-27

1981-06-23

Massie, Jerome W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 91, 156149, 156227, 156250, 156290, 1563084, 156475, 156529, 229 55, 428 35, B32B 3108, B32B 3118, B32B 3120, D03D 4750

Patent

active

042748968

ABSTRACT:
Sacks are made from a web comprising a tube of stretched plastics tape fabric woven around a thermoplastic tubular film. The web is continuously fed to a storage device from which two-ply sack lengths are intermittently withdrawn and severed and provided with a stitched base seam. Each severing cut is made to extend through transverse strips of hot-melt adhesive which were applied to both sides of the fabric tube and cooled. After severing and prior to stitching through both plies, the inner ply is provided with a separate base seam by means of welding jaws.

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patent: 2753597 (1956-07-01), Bird et al.
patent: 3134693 (1964-05-01), Curran
patent: 3385747 (1968-05-01), Klein et al.
patent: 3567537 (1971-03-01), Marteny et al.
patent: 3755033 (1973-08-01), Emus
patent: 3823047 (1974-07-01), Colombo
patent: 3855037 (1974-12-01), Imhagen et al.
patent: 3856599 (1974-12-01), Bylund
patent: 3861124 (1975-01-01), Bentzien
patent: 4021283 (1977-05-01), Weikert
patent: 4065049 (1977-12-01), Acheldohl et al.
patent: 4174804 (1978-11-01), Bosse

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