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. 18, 1979
Filed:
Jan. 23, 1978
James S Groom, Wales, MA (US);
Clarence F Prince, Springfield, MA (US);
Package Machinery Company, East Longmeadow, MA (US);
Abstract
A machine for stretch wrapping articles, such as trays of produce, poultry, meat and the like, has a wrapper feeding mechanism which positions measured lengths of stretchable wrapping material between an elevator mechanism and a folding mechanism which is located above the elevator mechanism and includes a plurality of relatively movable folding plates. Clamping mechanism releasably secures opposite marginal portions of the positioned wrapping material while the elevator mechanism raises an article to be wrapped into stretching engagement with the wrapping material, held by the clamping mechanism, and pushes the article up through an opening of adjustable size defined by parts of the wrapper feeding mechanism and the folding mechanism to stretch the wrapping material tightly over the article. Portions of the taut wrapping material are then folded under the article by the folding mechanism. A remaining portion of the wrapping material is folded under the article as the article is moved by an overhead conveyor across a stationary folding plate to a heat sealing station where the folded under portions of the wrapper are sealed against the bottom of the wrapped package.