James T Dejager

US Patent:

44282869, Jan 31, 1984

Filed:

Jan 21, 1982

Appl. No.:

6/341574

Inventors:

James DeJager - Melbourne FL
Leonard Ward - Melbourne FL

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

B41J 160

US Classification:

101111

Abstract:

This invention relates to a system for positioning a high-speed endless loop printing band of the type used on impact band printers. The band positioning apparatus includes a first sensor for being placed adjacent the edge of the endless loop band for detecting the drift of the edge to one side of a reference line. A second sensor is provided adjacent an area of the endless loop printing band for detecting the drift of the edge to the other side of the reference line. A microprocessor is coupled to the first and second sensors for generating a correcting output signal to a step motor. The step motor is coupled to a pulley in guiding communication with the endless loop printing band for displacing the pulley toward the reference line, thereby correcting the undesired movement of the edge of the endless loop printing band.