Browse Prior Art Database

Tape Cartridge

IP.com Disclosure Number: IPCOM000084768D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Froehlich, FB: AUTHOR [+2]

Abstract

U. S. Patent 3,825,208 discloses a tape cartridge structure in which a shell is locked to a spool by locking fingers. U. S. Patent 3,837,690 discloses a modification of such a cartridge, in which the locking fingers are removable from the cartridge and integral with a resilient sleeve. In yet another modification, shown above, a second flange is provided on the spool to control the amount of staggering of the tape on the hub during high-speed rewind. The flange also provides additional stabilization against accidental opening, for example, if the cartridge is dropped or jarred.

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Tape Cartridge

U. S. Patent 3,825,208 discloses a tape cartridge structure in which a shell is locked to a spool by locking fingers. U. S. Patent 3,837,690 discloses a modification of such a cartridge, in which the locking fingers are removable from the cartridge and integral with a resilient sleeve. In yet another modification, shown above, a second flange is provided on the spool to control the amount of staggering of the tape on the hub during high-speed rewind. The flange also provides additional stabilization against accidental opening, for example, if the cartridge is dropped or jarred.

As shown at (a) the cartridge consists of a cup-like shell 1 normally enclosing spool 2, including flange 3. Tape 4 is wound upon the spool. Spool 2 is locked onto shell 1 by a plurality of locking fingers 5, which are capable of being cammed into and out of locking relationship with locking shoulder 6 carried by the shell 1. As previously disclosed in U. S. Patent 3,837,690, locking fingers 5 are part of a subassembly which is removable from the spool 2, but which is itself normally locked to the spool by finger locks 7 nesting in openings in the spool. Shell 1 is normally produced of molded plastic and includes a sink mark prevention cavity 8.

This structure is capable of accepting second flange 9 with virtually no modification. As shown in an exploded view at (b), a central opening in flange 9 is dimensioned to slip onto spool 2 before locking finger structure 5 is insert...