Sealing apparatus useful in bag-making machine

B - Operations – Transporting – 31 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

B31B 39/00 (2006.01) B29C 65/18 (2006.01) B29C 65/78 (2006.01)

Patent

CA 2217257

In an apparatus useful for sealing layers of a web comprised of plastic film layers to one another in a bag-making machine, a sealing drum having a cylindrical surface is employed. A sealing blanket is deployed about plural blanket rolls and about the sealing drum so that a substantial portion of the cylindrical surface of the sealing drum is wrapped by the sealing blanket with the wrapping surface facing the cylindrical surface while the remaining portion of the cylindrical surface is not wrapped thereby at any given time. A nip roll acts together with one of the blanket rolls so as to define a nip. An idle roll is located near the nip. The sealing apparatus is operable so that the sealing blanket is drawn through the nip with the wrapping surface facing the nip roll, so that the web is drawn through the nip, between the nip roll and the wrapping surface of the sealing blanket, then around the idle roll, and then around the sealing drum, between the wrapping surface of the sealing blanket and the cylindrical surface of the sealing drum. The nip roll is pressed pneumatically with an adjustable pressure toward the blanket roll acting together with the nip roll, whereby the nip roll controls the tension on the web being drawn through the nip.

Cette invention concerne une machine à fabriquer des sacs par thermosoudage des côtés latéraux de deux pellicules en plastique au moyen d'un tambour de thermosoudage à surface cylindrique. Une toile d'entraînement montée sur une pluralité de rouleaux passe sur une partie substantielle du pourtour du tambour de thermosoudage pour appliquer les pellicules contre celui-ci, une partie du tambour n'étant jamais recouverte par ladite toile. Un rouleau placé au-dessus d'un des rouleaux porte-toile d'entraînement réalise un pinçage avant que les bandes de pellicule ne passent autour d'un rouleau-guide. La toile d'entraînement est montée de façon que les bandes de pellicule passent entre la face de serrage de la toile et le rouleau de pinçage puis autour du rouleau-guide pour revenir entre la face de serrage de la toile et le tambour de thermosoudage. Le rouleau de pinçage est appliqué contre le rouleau porte-toile contigu par un mécanisme de serrage pneumatique à pression réglable, ce qui permet de régler la tension d'entraînement des bandes de pellicule à cet endroit.

LandOfFree

Say what you really think

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

Rating

Sealing apparatus useful in bag-making machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sealing apparatus useful in bag-making machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealing apparatus useful in bag-making machine will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1351328

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