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:
Jan. 23, 1979
Filed:
Aug. 29, 1977
William R Stewart, Strathmartine, GB;
Wm. R. Stewart & Sons (Hacklemakers) Ltd., Dundee, GB;
Abstract
An opening roller for an open-end spinning machine carries an array of pins on its external surface. The pins are arranged in repeating patterns, each pattern comprising from 7 to 12 axially extending rows of equally-spaced pins, the relative dispositions of the pins in adjacent rows being such that the pins lie on lines parallel to a helix which passes through points in the first lines of two adjacent patterns, which points are axially off-set by three times the axial spacing of the pins in 7- or 8-row patterns, four times the axial spacing of the pins in 9- or 10-row patterns or five times the axial spacing of the pins in 11- or 12-row patterns. This arrangement reduces the risk of entanglement of fibres combed by one pin with fibres combed by an adjacent pin in the next row and reduces the tendency of the pins to direct fibres axially along the roller. An open-end spinning machine incorporating the roller is also disclosed.