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Browse Prior Art Database

Indexing Correction Tape Back Up Loop

IP.com Disclosure Number: IPCOM000052927D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 3 page(s) / 34K

Publishing Venue

IBM

Related People

Okcuoglu, SA: AUTHOR [+2]

Abstract

The drawing is a sectional, top view of a lift-off adhesive tape cassette in which an endless back-up loop 1 is moved by friction of the loop 1 against the back of the tape 3. The increased thickness provided by the loop 1 results in an increased spread of impact during correction to assure full correction without highly precise registration of the type face during erasure.

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Indexing Correction Tape Back Up Loop

The drawing is a sectional, top view of a lift-off adhesive tape cassette in which an endless back-up loop 1 is moved by friction of the loop 1 against the back of the tape 3. The increased thickness provided by the loop 1 results in an increased spread of impact during correction to assure full correction without highly precise registration of the type face during erasure.

As is now conventional in lift-off correction, an adhesive tape is carried on the typewriter along with mechanisms to bring the tape to the printing position. When the previous typing of an incorrect character is noted, the typewriter is brought to the position to print at the point of the error, and the typewriter is operated as to print the incorrect character except the lift-off correction tape is substituted for the marking ribbon. The tape pulls away the entire incorrect character, leaving a blank space available for the printing of a correct character.

Normally, slight variations in the position of the correction impact occur. The impact on the correction tape inherently spreads somewhat as it is transmitted through the tape, so that when the loss of registration is slight or the correction tape relatively thick, the erroneous character will be entirely covered by the impact for correction

The tape 3 in the instant cassette need not be of a thickness to achieve such necessary spread. The thickness at impact is supplemented by the back-up loop 1, which may be 0.0015 inch thick polyethylene terephthalate. Tape 3 may also be 0.0015 inch thick, thus increasing the tape 3 in the cassette and resulting yield by a factor of two, since the tape 3 in the same cassette can be twice as long.

The drawing shows the su...