Ribbon spool

US3944155A · kind A · utility

Assignee

• Victor Comptometer Corporation · US

Inventors

• Robert H. Wilczewski · Riverton, US
• Rudolf Schaefer · Duisburg, DE

Key dates

• Filing date: Apr 22, 1974
• Grant date: Mar 16, 1976
• Expiry date: Apr 22, 1994

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2301/414225
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

One piece ribbon spool molded from suitable plastic, with no fastening hardware with spool or on ribbon required, comprising spaced circular side guide flanges, a central cylindrical hub joined by radial ribs with ribbon-receiving segmental cylindrical wall, a female ribbon latch forming a hook for receiving free end of a male ribbon latch to anchor end of ribbon therebetween, other end of male latch forming unitary hinge connection, and outer surfaces of latches when in ribbon-anchoring position describing extension of cylindrical surface of segmental ribbon-receiving wall, the male latch being narrower than the space separating the side flanges, and apertures in the latter opposite the latches to facilitate engagement and disengagement of the ribbon and the spool.