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:
May. 15, 1984
Filed:
Oct. 05, 1982
Robert E Porter, Hamilton, MA (US);
Other;
Abstract
A top feed arrangement for cooperation with a lower feed dog of a sewing machine, the lower feed dog cyclically engaging and disengaging the lower surface of material to be sewn in order to move that lower surface along a predetermined path through and past the sewing machine. The top feed arrangement comprises an upper feed dog carried by an arm that is linked to an oscillatory take-off from the primary drive system of the sewing machine. The arm is connected to the device at one end in a pivotal connection and the upper feed dog is carried at the other end of the arm. The arm is resiliently urged in a direction to cause the upper feed dog normally to approach the lower feed dog. A lifter device also responsive to the primary drive system of the sewing machine, periodically moves the upper feed dog in a direction away from the lower feed dog against the resilient force. The linkage from the sewing machine drive to the top feed is housed in a recessed area removed from the work and an uncluttered large work area is provided.