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:
Dec. 29, 1998
Filed:
Dec. 04, 1997
John M Linkiewicz, Prospect Heights, IL (US);
Triangle Package Machinery Company, Chicago, IL (US);
Abstract
A form-fill-seal machine in which an heated longitudinal seam sealer continuously forms a longitudinal seam along lapped edges of the tube being formed. This longitudinal seam sealer can be used in machines having conventional cross sealing jaws as well as in machines in which the cross sealing jaws move in the direction of the moving film during the cross sealing operation. The heated longitudinal seam sealer includes a pair of sealer bars that include shaped confronting portions. The shaped confronting portions are heated and seal the lapped edges to form a seam. After exiting the shaped confronting portions the seam is engaged by a pair of pressure rollers that force the heated edges together to insure complete closure of the seam. The lapped edges of the film pass between the shaped confronting portions of the sealer bars which confine the lapped edges to a labyrinth cross section shape. The drive for the continuous movement cross sealing jaws include a pair of gear cases on opposite of the sealing jaws, each having two sets of spaced drive shafts. The drive shafts include cranks that impart rotary motion to a pair of link bases for the front and rear sealing jaw. Pairs of parallel links are pivotally connected at one end to the link bases and at the other end to the sealing jaws. The pivot connections of the parallel links include pressure or torsion members which bias the sealing jaws toward engagement.