公开(公告)号：DE1524865A1

公开(公告)日：1970-10-01

申请号：DE1524865

申请日：1967-08-22

Applicant: IBM

Inventor： ISSA AWEIDA JESSE ,  BARNETT HUMPHREY ROBERT ,  WILLIAM ORLANDO ANTHONY ,  POPP GEORGE

IPC: B65H5/22 ,  B65H5/38 ,  G11B15/38 ,  G11B15/58 ,  G11B15/66 ,  G11B15/67 ,  G11B23/027 ,  G11B23/107 ,  B41J

Abstract: 1,171,706. Tape reels. INTERNATIONAL BUSINESS MACHINES CORP. 27 July, 1967 [26 Aug., 1966], No. 34494/67. Heading B8M. [Also in Division G5] In a tape recorder incorporating an automatic, pneumatically-operated tape threading arrangement (see Division G5), a take-up reel 6 is provided with its hub 18 and flanges 16 apertured to allow suction to attract and secure the tape end. The hub is formed with small bores 34 extending parallel to the hub axis which, when the hub is mounted on its drive shaft 14 connect, via ports 25 and circular slot 13 in chamber 17, a source of vacuum to the apertures 23 in the hub surface. In addition, similar larger diameter bores 35 connect larger apertures 21, 22 which extend as grooves in the flanges 16, to the common vacuum source when these are in the section N defined by slot 15. The suction produced by the larger apertures attracts a tape in sector N towards the hub and the tape is secured thereto by the suction of the smaller apertures.

公开(公告)号：DE1499699A1

公开(公告)日：1970-04-23

申请号：DE1499699

申请日：1966-06-25

Applicant: IBM

Inventor： BARNETT HUMPHREY ROBERT

IPC: G06F11/14 ,  G11B15/38 ,  G11B17/32 ,  G11B20/18 ,  H01P1/16 ,  H01P1/26 ,  H01P5/12 ,  G11B5/02

Abstract: 1,139,207. Monitoring data on a magnetic tape or disc. INTERNATIONAL BUSINESS MACHINES CORP. 23 May, 1966 [2 July, 1965], No. 22822/66. Heading G5R. Signals from and to a computer 60 are recorded and/or sensed on a magnetic tape 10 which moves at a velocity V past write and read head gaps 61, 62 in a surface 31 separated from the tape by a spacing h which is controlled by varying the vacuum pressure in ports S1 to S6, by means of a variable pneumatic resistance 52. If there is an error in the signal read by head 42 it is sensed by an error check circuit 21 which causes computer 60 to respond in a particular programmed manner to control movement of the tape forward, backward or to stop it in order to write, read, backspace block, forward space block or rewind the tape. Circuit 21 also sets an error trigger 22 and a pneumatic control trigger 28 which reduces pneumatic resistance 52 and decreases spacing h. The error is corrected by continually rewriting and rereading that part of the tape on which the error occurs, with the tape 10 and surface 31 separated by the reduced spacing h.