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:
Jul. 23, 1991
Filed:
Sep. 07, 1989
Richard D Nordlof, Rockford, IL (US);
Other;
Abstract
A roll type stock feed apparatus having a servomotor drive and a programmable controller operable to drive the feed rolls to feed stock in preselected incremental lengths. A ram position sensor is arranged to be actuated when the ram moves in a downstroke and to be deactuated when the ram moves in an upstroke and the programmable controller is operated in response to the sensor to drive the feed rolls when the sensor is deactuated. The interval between successive actuations of the ram position sensor is timed to measure press speed. The interval between actuation and deactuation of the ram position sensor is also timed to control shifting of one feed roll into feeding engagement with the stock when the ram is at a preselected position intermediate the ram positions at which the sensor is actuated and deactuated. The upper feed roll is shifted into and out of feed position by a double acting piston, and air under regulated pressure is supplied to the upper side of the piston to bias the feed roll downwardly and air under pressure is selectively supplied and exhausted from the underside of the piston to effect shifting of the upper feed roll out of and into feeding engagement with the stock.