Browse Prior Art Database

SELF-SUPPORTINGCOM PLIANT SUBSTRATES FOR RIBBONS

IP.com Disclosure Number: IPCOM000024153D
Original Publication Date: 1979-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 246K

Publishing Venue

Xerox Disclosure Journal

Abstract

Modern multistrike or multiuse typewriter or printer ribbons consist of a supporting substrate layer and an ink-containing spongy layer. When the two layers are cohesively bonded together to form a unitary body (no distinct phase boundary), the ribbons are said to be self.supporting. The substrate and the sponge material of the

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XEROX DISCLOSURE JOURNAL

SELF~~SUPPORTINGCOM PLIANT Proposed Classification SUBSTRATES FOR RIBBONS U.S. CL 400/237

mt. CL B41j

Modern multistrike or multiuse typewriter or printer ribbons consist of a supporting substrate layer and an ink~containing spongy layer. When the two layers are

cohesively bonded together to form a unitary body (no distinct phase boundary), the ribbons are said to be self.supporting. The substrate and the sponge material of the

ink layer may or may not be the same material. The substrate section of the self~ supporting ribbon structure normally is formed in situ by casting a dilute polymer solution on a temporary support web such as Mylar. Consequently, it can be made very thin (e.g., <10 M or 0.4 mu) without much handling difficulty. This yields a

thinner ribbon, which is very desirable because thin ribbon can conform to the type font better, giving rise to a sharper print character. The use of a tough and resilient material for the ribbon substrate can further enhance ribbon print quality and durability. In these cases, the ribbons are said to be compliant.

This disclosure is directed to self-supporting, compliant substrates made from mixtures or blends of appropriately selected polymers or copolymers. An example is a mixture of a polyurethane with a copolymer of vinylidene chloride~- acrylonitrile. Specifically, about 14-18 parts by weight of Dow Chemical F310 vinylidene chloride-acrylonitrile resin and about 2-~6 parts by weight of B....