International Business Machines Corporation

Eric Sigfried Petterson

Howard Carl Tanner

John Charlie Greek, Jr

Michael C Barrett

David Wesley Terry

A magnetic tape cartridge includes a housing for supporting the tape for movement therein and for enclosing a portion of the tape. The tape is expandable from a particular reference point along its width by virtue of temperature and humidity changes. A track position indicator attached to the cartridge includes indicia thereon relative to track positions along the width of the tape. The indicator has a coefficient of expansion closely similar to the coefficient of expansion of the tape, and in the preferred embodiment is made of the same material as the magnetic tape substrate material.

Tape cartridge with track position indicator

A system for positioning final copy printed text, upon a first printing, at a specified location on a line in a format determined by input keying. The location can be a blank block on a form to be filled in. After initial setup and during any input or output operation, a final copy printed text mode can be entered by an operator and stored. This will inhibit printing upon further keying until a carrier return is keyed following the text. The printer carrier is positioned through spacing, backspacing, tabbing, etc. relative to the left side of the block, and codes representative thereof are also stored. When the carrier is at the left side of the block, the keying of a variable space or character will define a tentative format and this location, and a variable space or character code will be stored. Then the text is keyed and stored. After the text has been keyed, the keying of spaces, backspaces, tabs, and/or variable spaces will result in codes representative thereof being stored and the final copy text format being finalized. When the carrier is located at the right side of the block, a carrier return is keyed and this location is defined by the storing of a segment end code. The carrier is then automatically returned to the position occupied at the time of keying the final copy printed text mode. Thereafter, the carrier is positioned at the beginning print point for the format determined by input keying, and the final copy text is printed.

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Austin, TX, United States of America

Eric Sigfried Petterson