International Business Machines Corporation

Myron F Shlatz

Barton H Kunz

Lowell M Simson

Jesse Wayne Spears

Donald G Pittwood

Fred E Grospin

Frederick S Gobran

In apparatus for repairing printed circuit lines or attaching electrical components, a pair of brazing electrodes and holder therefor in which the electrodes can be repetitively extended to compensate for wear without necessity of removal and machining heretofore required. The holder is a part of the circuit delivering electrical power to the electrodes and makes contact with the electrodes close to the working tip to maintain uniform circuit resistance and repairs of consistent quality.

Renewable brazing electrodes

A paper feed device to forward documents to be copied across a document glass utilizing foraminous rollers positioned above the glass at a slight angle to the direction of document movement to move the side of the document into sliding relationship with a reference edge during the forwarding operation. The angle is produced by a curved drive shaft and rollers at opposite ends of the drive shaft are at different angles to the direction of paper movement. The rollers and drive train are rigidly mounted on a plate which is nonrigidly carried in a frame which pivots about a hinge at one end of the document glass. The plate rests on the top surface of front and rear reference edges when the frame is closed to assure accurate positioning of the rollers in relation to the document glass. After completing the forward feeding of a document, it is reversed a slight distance to a registration position for the copying operation.

Document feed device

A document feed mechanism for a copier machine incorporating an automatic document feed (ADF) with a semi-automatic document feed (SADF) and enabling the SADF to interrupt the ADF. The ADF tray upon which a stack of documents to be copied is placed is situated directly above the viewing station. A wave generator (shingler) paper feed means fans out the topmost sheets on the stack and up a ramp until the topmost sheet enters closed nip rollers. The nip rollers, together with aligner rollers and a drive belt, move the sheet around a substantially 180.degree. bend and onto the viewing station. Second sheet feeds are prevented by a restraint pad positioned between the nip rollers and the exit of the ramp, the top of the restraint pad being above the nip of the nip rollers so that the topmost sheet presses a second sheet downwardly into the restraint pad. The SADF feeds sheets onto the viewing station using the aligner rolls and the drive belt.

Document feed for a copier machine

Method and apparatus for automatically producing a duplexed copy in a document copier machine wherein the leading edge of the rectangular copy sheet is maintained during both passes through the machine and wherein both simplexed and duplexed copies may be collated. This method and apparatus is especially useful when the leading edge is the narrow dimension of the rectangular copy paper.

Growing community of inventors

Boulder, CO, United States of America

Myron F Shlatz