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:
Feb. 24, 1987
Filed:
May. 30, 1984
Richard R Walton, Boston, MA (US);
George E Munchbach, Roslindale, MA (US);
Other;
Abstract
A pickup device for sheet-form flexible fabric comprising first and second gripping elements which move laterally in the plane of the fabric in an angle to the direction of clamping, whereby the fabric is tensioned before clamping. Preferably the clamping elements of the teeth have vertical frontal edges, the teeth arranged to come together during final motion, and preferably the teeth being in matching parallel lines. Jets of air are employed to assist in separation, either blowing down at the gripping lines, or between pairs of devices that tension the fabric, or, in regions where the fabric droops below a lifting pickup, using a device that moves the jets closely against the drooping fabric portion. An array of such pickups is rotated about an axis to turn upside down or end for end. All features can be achieved simply by lines of teeth carried on elongated spring arms that are cammed together.