Band line printer with grooved platen

US5315928A · kind A · utility

Assignee

• International Business Machines Corporation · US

Inventors

• D. Michael Bocinski · Binghamton, US
• Craig A. Kaufman · Apalachin, US
• Randy J. Kisacky · Johnson City, US
• Barton H. Kunz · Longmont, US
• Lawrence A. Stone · Austin, US
• Jerry Z. Raski · Endicott, US
• David Schaefer · Wilsonville, US
• Douglas A. Schmidt · Owego, US

Key dates

• Filing date: Nov 20, 1992
• Grant date: May 31, 1994
• Expiry date: Nov 20, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J1/20
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An impact printer has a print band moving longitudinally around pulleys with one side of the band moving in contact along a rigid platen and the other side having engraved characters presented along a print line of a print medium (e.g. paper and ink ribbon). The leading edge of platen is squared off (e.g. sharp) to scrape contamination off the band. A row of hammers impact the print medium against the band between the hammers and an impact surface of the platen. The impact surface of the platen contains multiple longitudinal grooves which start slightly back from the leading edge of the platen and which prevent increased friction force between the band and platen from occurring as the band wears the platen impact surface smooth.