Web transport system with electro-optical label detection

US4383880A · kind A · utility

Assignee

• Dennison Manufacturing Company · US

Inventors

• Friedrich H. H. Geurtsen · Holliston, US
• Waldemar S. Kebbel · Bremen, DE
• Manfred Meyer · Friedrichsdorf, DE

Key dates

• Filing date: Dec 11, 1981
• Grant date: May 17, 1983
• Expiry date: Dec 11, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/171
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A label carrier web transport for use in heat transfer decorators and the like, in which labels are optically registered to control web transport. A timing assembly coordinates the rotation of a cam shaft with the actuation and deactuation of clutch and brake assemblies within a metering roll. An optical scanner trained on the web registers a predetermined contrast location to actuate the brake and deactuate the clutch, subject to the presence of an enabling signal from the timing assembly. The metering roll, in combination with a reciprocating label shuttle, provides intermittent web motion to achieve controlled label advance. An alternative label transport system incorporates a capstan web drive in lieu of the metering roll, with a microprocessor to control various machine functions including intermittent web transport.