Browse Prior Art Database

Peripheral Print Shield

IP.com Disclosure Number: IPCOM000078952D
Original Publication Date: 1973-Apr-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Boyatt, RG: AUTHOR

Abstract

An operator replaceable print shield is illustrated. Mounting bracket 10 is provided with pins to hold card holder 12 in an appropriate relationship with the remainder of a typewriter. Formed into the concave surface of card holder 12 are two retaining pins 14. A print shield 16 which is operator replaceable, is formed from a thin sheet of substantially clear or at least highly translucent film, such as KAPTON*, and is coated with a low-surface energy material such as a fluorocarbon. Formed in the piece of film material which has been coated, are two holes 18 which allow the print shield 16 to be mounted on the studs or pins 14. Additionally, a print aperture 20 is formed in the print shield 16, to allow impact of the type element and ribbon onto paper carried by platen 22.

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Peripheral Print Shield

An operator replaceable print shield is illustrated. Mounting bracket 10 is provided with pins to hold card holder 12 in an appropriate relationship with the remainder of a typewriter. Formed into the concave surface of card holder 12 are two retaining pins 14. A print shield 16 which is operator replaceable, is formed from a thin sheet of substantially clear or at least highly translucent film, such as KAPTON*, and is coated with a low-surface energy material such as a fluorocarbon. Formed in the piece of film material which has been coated, are two holes 18 which allow the print shield 16 to be mounted on the studs or pins
14. Additionally, a print aperture 20 is formed in the print shield 16, to allow impact of the type element and ribbon onto paper carried by platen 22.

This technique allows the operator to change the print shield 16 as is necessary to maintain a clean print shield, or to replace one which has become damaged through use. The size of aperture 20 will depend upon the size and dependency of a particular type face to side print.

This type of print shield is particularly advantageous with a 96-character printing element which of necessity has very closely spaced characters, and thus a high tendency for side printing that additionally tends to deteriorate the print shield with extensive use. * Trademark of E. I. du Pont de Nemours & Co.

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