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:
Sep. 19, 1978
Filed:
Oct. 31, 1977
Otto Kirch, Mehlingen, DE;
Erich Willenbacher, Rheinstetten, DE;
Abstract
A sewing machine for producing edge parallel seams in workpieces of any contour, includes a sewing machine needle which is reciprocated in a stitch forming area. A workpiece ruler guide extends laterally of the stitch forming area at an angle to a line passing through the needle axis. In addition, there is a workpiece guide mechanism which includes upper and lower guide plates forming a workpiece passage space therebetween which extends alongside the ruler. The upper plate is mounted over the lower plate for upward and downward movement relative to the lower plate and it includes a pressure point for applying a braking action on the workpiece which is effective when a tension member which is engageable with a pressure spring moves in a direction to stretch the pressure spring and increase the tension acting thereon and to urge the lower plate downwardly into engagement with the workpiece. The tension member is movable in an opposite direction to a rest position to decrease the tension on the pressure spring and, at such times, a lifting spring acts on the upper plate and produces an upward lifting force thereon to lift the upper plate.