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Class Information
Number: 242/331.1
Name: Winding, tensioning, or guiding > Unwinding and rewinding a machine convertible information carrier (e.g., magnetic tape or photographic film) > Intermediate storage (e.g., low inertia bin) > Vacuum column
Description: Subject matter comprising means to create a negative pressure in a portion of the buffer zone to draw a length of material toward the zone.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5003424 |
Apparatus for changing the helix angle of magnetic tape relative to a rotary head scanner |
Mar. 26, 1991 |
| 4958247 |
Magnetic tape recorder having tape buffer vacuum chambers and ante chambers |
Sep. 18, 1990 |
| 4714212 |
Pneumatic tape tensioning device for a cassette loading machine |
Dec. 22, 1987 |
| 4700909 |
Tape deck having improved tape path |
Oct. 20, 1987 |
| 4512505 |
Convertible platen for graphics plotter |
Apr. 23, 1985 |
| 4331306 |
Magnetic tape device |
May. 25, 1982 |
| 4316568 |
Methods and apparatus for guiding tape |
Feb. 23, 1982 |
| 4315287 |
Magnetic tape transport system |
Feb. 9, 1982 |
| 4264936 |
Altitude correcting vacuum system |
Apr. 28, 1981 |
| 4216889 |
Vacuum tank for magnetic tape handlers |
Aug. 12, 1980 |
| 4189113 |
Isolation pocket for rack mounted tape drive |
Feb. 19, 1980 |
| 4183068 |
Magnetic tape transport mechanism |
Jan. 8, 1980 |
| 4176382 |
High performance tape path for a 19 inch tape recorder |
Nov. 27, 1979 |
| 4093148 |
Tape path for a magnetic tape transport system |
Jun. 6, 1978 |
| RE29301 |
Noise muffler for magnetic tape vacuum column |
Jul. 12, 1977 |
| 3948459 |
Folded vacuum tanks for high speed magnetic tape recorders |
Apr. 6, 1976 |
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