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:
Sep. 27, 1977
Filed:
Jan. 21, 1976
Robert J Kobiella, Rolling Meadows, IL (US);
Signode Corporation, Glenview, IL (US);
Abstract
An automatic strapping machine is disclosed wherein strap is fed at a high rate of speed about a package so as to form a loop which is then tensioned and sealed. The loop is formed so that the leading end of the strap is overlapped by a trailing end of the strap and the resulting overlapped strap portions are joined together so as to form a seal which is not susceptible to snagging. The distal end of the overlapping strap end portion is urged against and is moved back and forth relative to an underlying strap portion in tension at a high rate of speed so as to generate heat therebetween and to form a friction-fused joint. During joint formation the strap loop about the package is in tension, but the strap end portion overlapping the loop is relaxed, i.e., not in tension. Sealing energy generating means is adapted to engage the distal end of the overlapping strap end portion and comprises a pivotable anvil and a rotatable - oscillatable hammer adapted to receive overlapping strap regions therebetween, and an oscillating motor means for the hammer which engages the loop-over-lapping strap end portion and rubs the overlapping end portion against the underlying strap region at a rate sufficient to melt an interface region therebetween and to form a friction-fused joint when energized by the oscillating motor means.