Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Severing means is perforator
Reexamination Certificate
2007-01-09
2007-01-09
Heckenberg, Donald (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Preform severing means
Severing means is perforator
C425S363000, C425S384000, C425S471000, C425SDIG037
Reexamination Certificate
active
10679633
ABSTRACT:
The present invention provides an apparatus and methods for flame-perforating polymeric films with an oxygen-enriched flame. One embodiment of the apparatus includes a frame, a support surface attached to the frame, where the support surface includes a plurality of lowered portions, an oxygen-enrichment system for increasing the amount of oxygen in the combustible mixture, a burner attached to the frame opposite the support surface, where the burner supports a stable flame, and a film contacting the support surface, where the flame of the burner is directed towards the film to cause the film to be perforated. One embodiment of the method of flame perforating a polymeric film includes igniting an oxygen-enriched combustible mixture to form a stable flame, wherein the flame generated by the oxygen-enriched combustible mixture provides more uniform perforations.
REFERENCES:
patent: 3012918 (1961-12-01), Schaar
patent: 3153683 (1964-10-01), Bryan et al.
patent: 3153684 (1964-10-01), Bryan et al.
patent: 3255034 (1966-06-01), Covington et al.
patent: 3347697 (1967-10-01), Gmitro
patent: 3361607 (1968-01-01), Bruno
patent: 3375126 (1968-03-01), Nagel
patent: 3394211 (1968-07-01), MacDuff
patent: 3431135 (1969-03-01), Keane et al.
patent: 3783062 (1974-01-01), Martin
patent: 4458608 (1984-07-01), DeBrucq
patent: 4622237 (1986-11-01), Lori
patent: 5891967 (1999-04-01), Strobel et al.
patent: 6635334 (2003-10-01), Jackson et al.
patent: 525 154 (1982-10-01), None
patent: 783664 (1957-09-01), None
patent: 851053 (1960-10-01), None
patent: 854473 (1960-11-01), None
patent: 1012963 (1965-12-01), None
patent: 1073605 (1967-06-01), None
patent: 1 085 949 (1967-10-01), None
patent: 1085949 (1967-10-01), None
patent: 04-007337 (1992-01-01), None
patent: 04-059344 (1992-02-01), None
Strobel et al.,Flame Surface Modification of Polypropylene Film, Journal of Adhesion Science Technology, vol. 10, No. 6, pp. 515-539 (1996).
U.S. Appl. No. 10/267,538, filed Oct. 9, 2002, An Apparatus For Flame-Perforating Films and Methods of Flame-Perforating Films.
Getschel Joel A.
Strobel Mark A.
Ulsh Michael J.
3M Innovative Properties Company
Heckenberg Donald
LandOfFree
Apparatus for oxygen enriched flame-perforation of a polymer... 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 oxygen enriched flame-perforation of a polymer..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for oxygen enriched flame-perforation of a polymer... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3811490