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:
Apr. 09, 1991
Filed:
Mar. 30, 1988
William R Stewart, Craigmount, GB;
David B Stewart, Navay Park, GB;
Abstract
A pinned opening roller for an open end spinning machine wherein the pinning pattern around the circumferential surface of the roller is provided by spaced pairs of rows of pins which may extend parallel to the rotational axis of the roller, the spacing between the pairs of rows being greater than the spacing between the rows in each pair and in any pair, the pins in one row being staggered relative to those in the other row. Preferably, for a 71/2' circumference roller approximately 1' wide the pins in each row are spaced 0.1' apart and the rows in a pair are 0.03' apart and there are 28 pairs of rows around the circumference. Preferably, the pins in one row of a pair are each spaced equidistant from their adjacent pins in the other row and the pins in the first row of each pair are helically arranged and those in the second row of each pair also extend helically around the circumference of the roller.