Browse Prior Art Database

Tape Cartridge Reel Brake

IP.com Disclosure Number: IPCOM000047271D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

McMurtry, DH: AUTHOR [+2]

Abstract

A cartridge must hold the tape within its boundaries at all times except when placed into the drive system, at which time easy access to the tape as well as free wheeling of the tape must be accomplished. A reel brake design which permits ease of access to a leader block of a tape when the drive system opens a door, while providing a wedging action that firmly holds the reel in place in any other position, is shown in the figures. Fig. 1 shows a cutaway section of a cartridge 1 including a spring brake arm 2 wedged between a ramp 3 on the top cover 4 of the cartridge and the reel 5 of tape. Wedging the reel 5 against the bottom cover 6 of the cartridge 1 prevents a motion of the cartridge through either friction or through sawtooth teeth formed in both the reel 5 and the bottom cover 6 of the cartridge. In Fig.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Tape Cartridge Reel Brake

A cartridge must hold the tape within its boundaries at all times except when placed into the drive system, at which time easy access to the tape as well as free wheeling of the tape must be accomplished. A reel brake design which permits ease of access to a leader block of a tape when the drive system opens a door, while providing a wedging action that firmly holds the reel in place in any other position, is shown in the figures. Fig. 1 shows a cutaway section of a cartridge 1 including a spring brake arm 2 wedged between a ramp 3 on the top cover 4 of the cartridge and the reel 5 of tape. Wedging the reel 5 against the bottom cover 6 of the cartridge 1 prevents a motion of the cartridge through either friction or through sawtooth teeth formed in both the reel 5 and the bottom cover 6 of the cartridge. In Fig. 2 the spring brake arm 2 and a door 7 are shown in solid lines when the brake is to be applied and the door is in the closed position. When the door 7 is rotated around its pivot point 8 to the open position, shown in the dotted lines, the brake arm 2 is rotated out of contact with the reel 5 and therefore the reel is free to rotate, permitting removal of the tape from the cartridge. Fig. 3 shows the detail A of Fig. 2. In Fig. 3, the solid lines again denote the position of the door 7 and the brake arm 2 in the closed position, and the dashed lines show the position of the door 7 and brake arm 2 in the open position. One end 9 of the brake arm 2 is connected to the door 7 at a distance from the pivot point 8 of the door. The spring brake arm 2 is then wrapped into a coil 10 to urg...