Package making – Methods – Plural covers
Patent
1987-11-16
1989-01-31
Sipos, John
Package making
Methods
Plural covers
53472, 53474, 53554, 53238, 53451, B65B 902, B65B 5520
Patent
active
048007080
ABSTRACT:
A method and apparatus is disclosed for successively forming foam filled bags or cushions of the type wherein a foamable composition is deposited in a plastic bag. The formed bags are adapted to be placed in containers with articles being packaged, and so that when the foam expands, the bags and resulting foam are conformed to the configuration of the articles. The method and apparatus includes advancing a pair of plastic webs through the nip of a pair of drive rollers, while heat sealing the opposing longitudinal side edges of the webs together. Periodically, a predetermined amount of the foamable composition is deposited between the advancing webs immediately above the nip, and the heat sealing along the side edges is periodically and momentarily interrupted to form side edge openings for the subsequent escapement of gases generated during foaming. The advance of the webs is momentarily terminated, and a heated wire then engages the webs to sever the formed bag, while forming a sealed top edge of the formed bag and a sealed bottom edge for the next succeeding bag. The advance then again commences, and the cycle is repeated to successively form the foam filled bags.
REFERENCES:
patent: 2420983 (1947-05-01), Salfisberg
patent: 2805973 (1957-09-01), Klasing et al.
patent: 2897641 (1959-08-01), Simon
patent: 3049463 (1967-08-01), Kallander
patent: 3061475 (1962-10-01), Wallace
patent: 3166454 (1965-01-01), Voelker
patent: 3204385 (1965-09-01), De Remer et al.
patent: 3222843 (1965-12-01), Schneider
patent: 3307318 (1967-03-01), Bauman
patent: 3340669 (1967-09-01), Farquharson
patent: 3355854 (1967-12-01), Lowry
patent: 3412521 (1968-11-01), Bauman
patent: 3469363 (1969-09-01), Berckmoes
patent: 3485347 (1969-12-01), McGill et al.
patent: 3735551 (1973-05-01), Pratt
patent: 3768724 (1973-10-01), Hill
patent: 3804931 (1974-04-01), Miller
patent: 3846569 (1974-11-01), Kaplan
patent: 3933548 (1976-01-01), Anderson, Jr. et al.
patent: 3940905 (1976-03-01), Perry
patent: 3977931 (1976-08-01), Peille
patent: 4077186 (1978-03-01), Voegele
patent: 4193499 (1980-03-01), Lookholder
patent: 4232788 (1980-11-01), Roth
patent: 4317321 (1982-03-01), Torterotot et al.
patent: 4622185 (1986-11-01), Kostich
patent: 4631905 (1986-12-01), Maloney
patent: 4674268 (1987-06-01), Gavronsky
Sealed Air Corporation
Sipos John
LandOfFree
Apparatus and method for forming foam cushions for packaging pur does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for forming foam cushions for packaging pur, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for forming foam cushions for packaging pur will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-171438