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. 11, 1979
Filed:
Apr. 06, 1978
John S Whittenberger, Sidney, OH (US);
Graphics Equipment International Corporation, Chicago, IL (US);
Abstract
Each section of a buckle sheet feed folding machine is driven by a silicon controlled rectifier (SCR) controlled DC motor. The speed of the first section is infinitely variable by means of a rheostat in the SCR control. A signal related to the speed of the first section is applied to all subsequent SCR controls such that the speed of all fold sections will follow changes made to the speed of the first section. Each section also includes a rheostat to vary the relative speed between that section and the first. A switch is provided at each subsequent section in order to disconnect the first section speed signal and apply an independent control signal.