Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Reexamination Certificate
2005-05-10
2005-05-10
Kim, Eugene (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
Reexamination Certificate
active
06890290
ABSTRACT:
The present invention relates to a method and apparatus for folding and sealing a web of material to form an item with a contoured seal such as a valve bag. Folding apparatus form the web of film into a continuous tubular web having upper and lower sections, a closed side and an open side. The open side has two folded flaps that extend into an inside area of the tubular web. A longitudinal sealer includes a floating sealer located inside the tubular web. The floating sealer and its contoured heating element are selectively and intermittently pressed against the overlapping flaps to form a contoured seal that bonds the flaps together. The contoured seal defines a self-sealing valve port through which product is poured to fill the bag. Pairs of repelling magnets biasingly elevate the floating sealer above the overlapping flaps when the longitudinal sealer is in its release position. The sealer “floats” inside the continuous tubular web so that the web can be intermittently drawn past the floating sealer with a minimal amount of drag.
REFERENCES:
patent: 3570375 (1971-03-01), Williams et al.
patent: 3713269 (1973-01-01), Sato
patent: 4019947 (1977-04-01), Stock et al.
patent: 4026460 (1977-05-01), May
patent: 4071187 (1978-01-01), LaFleur
patent: 4132347 (1979-01-01), Saito
patent: 4441209 (1984-04-01), Lunshof et al.
patent: 4464879 (1984-08-01), Loesch
patent: 4470152 (1984-09-01), Blankenship
patent: 4524460 (1985-06-01), Twiehoff et al.
patent: 4954124 (1990-09-01), Erickson et al.
patent: 5086964 (1992-02-01), Blaser
patent: 6095960 (2000-08-01), Achelpohl
patent: 6233902 (2001-05-01), Nakagawa
patent: 6357915 (2002-03-01), Anderson
patent: 6422986 (2002-07-01), Claybaker et al.
patent: 5080643 (2003-03-01), Mitchell
patent: 6561962 (2003-05-01), Engelhart
patent: 6629917 (2003-10-01), Vanden Langenberg et al.
Hathaway John M.
Holtz Kurt R.
Pansier Donald J.
Winicki Greg S.
Amplas, Inc.
Andrus Sceales Starke & Sawall LLP
Kim Eugene
LandOfFree
Method and apparatus for producing valve bags does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for producing valve bags, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for producing valve bags will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3460804