The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 1992
Filed:
Jan. 04, 1991
Applicant:
Inventors:
Anders Anderson, Staffanstorp, SE;
Tom Kjelgaard, Loddekopinge, SE;
Assignee:
Tetra Pak Holdings SA, Pully, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B31B / ; F26B / ; D02J / ;
U.S. Cl.
CPC ...
392417 ; 53482 ; 533737 ; 1562751 ; 156499 ; 1563809 ; 156324 ;
Abstract
A method of heating a portion of a continuous material strip includes heating the web through use of one or more IR lamps provided with radiation-concentrating reflectors. The IR lamps are directed towards a restricted area on the web to thereby heat the thermoplastic surface in the restricted area to a temperature that corresponds to the melting temperature of the thermoplastic. The web can be provided with a color strip in the restricted area, whereby the color strip absorbs the heat from the IR lamps.