Web transport system with electro-optical label detection

US4452659A · 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: Nov 22, 1982
• Grant date: Jun 5, 1984
• Expiry date: Nov 22, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65C9/1873
• 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.