Apparatus for sealing a hem in a moving web of film

Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

493208, 493225, 493381, 493386, 493394, 493928, 1565831, 1565833, 1565834, 15658391, B31B 2364, B31B 2386

Patent

active

047215020

ABSTRACT:
Apparatus for sealing a hem in a moving web of plastic film having a structure including a folding surface having a web passing on one side of the surface and an edge of the web on the other side of the surface to produce a hem in the web prior to leaving the surface. Heat sealing apparatus is supported adjacent the structure for heat sealing the hem while the web is moving and prior to the sealed hem leaving the surface. The surface is provided with an opening in alignment with the heat sealing apparatus and the heat sealing apparatus seals the hem through the opening. The heat sealing apparatus includes a plurality of heated rollers supported on one side of the structure, the rollers being adapted to extend through the opening in the surface and backup rollers are positioned on the opposite side of the structure and in alignment with the opening for cooperation with the heated rollers to engage the opposite sides of the hem for heat sealing the hem while the web is moving and prior to the sealed hem leaving the surface.

REFERENCES:
patent: 2125758 (1938-08-01), Waters
patent: 2242799 (1941-05-01), Moore
patent: 2741956 (1956-04-01), Diffenbaugh
patent: 2897729 (1959-08-01), Ashton et al.
patent: 2971874 (1961-02-01), Canno
patent: 3029853 (1962-04-01), Piazze
patent: 3058402 (1962-10-01), Kugler
patent: 3058403 (1962-10-01), Kugler
patent: 3406610 (1968-10-01), Golden
patent: 3414032 (1968-12-01), Jortikka
patent: 3575766 (1971-04-01), McArthur et al.
patent: 3759772 (1973-09-01), Andersson
patent: 3844090 (1974-10-01), Pepmeier
patent: 3935048 (1976-01-01), Rucker
patent: 4140046 (1979-02-01), Marbach
patent: 4202721 (1980-05-01), Roberts

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for sealing a hem in a moving web of film 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 for sealing a hem in a moving web of film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for sealing a hem in a moving web of film will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1466757

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.