Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Dual-column tension and speed controller for high speed tape transporter










Image Number 9 for United States Patent #4727440.

A closed loop, high-speed tape transporter (10) includes a vacuum supply (11A), a first vacuum column (40) operatively connected to the vacuum supply (11A) and positioned upstream from a pick-up head (100) and downstream from a tape bin (64) for receiving the loop of tape and exerting a vacuum-induced holdback tension thereon, a second vacuum column (50) operatively connected to the vacuum supply (11A) and positioned downstream of head (100) and upstream of the tape bin (64) for exerting a vacuum-induced pull forward tension on the tape in opposition to the holdback tension exerted on the tape by the first vacuum column (40). A motor-driven capstan (60) is positioned intermediate the pick-up head (100) and the second vacuum column (50). Capstan (100) is driven at a constant speed equal to the ideal reference tape duplication speed. Tape drive capstans (62A) and (70A) cooperate with the first and second vacuum columns (40) and (50) for moving the tape. A servo-control (42 ), (45), (48) senses changes in the position of the tape within the first vacuum column (40) and sends a signal to tape drive (70A) and a servo-control (58), (55), (56) senses changes in the position of the tape within the second vacuum column (50) and sends a signal to tape drive (62A). The speed of the tape is varied as it moves through the first and second vacuum columns (40), (50) thereby minimizing tension induced speed variation in the tape in the region of the pickup head (100).








 
 
  Recently Added Patents
Floribunda rose plant named `KORamflusa`
Vehicle drive control system
Adaptive control for uncertain nonlinear multi-input multi-output systems
Synthesis of 8-amino boron dipyrromethenes having blue fluorescence
Optoelectronic devices and a method for producing the same
Light fixture
Server-side web analytics system and method
  Randomly Featured Patents
Method for selecting an item of equipment and control unit enabling this method to be implemented
Package design
Measuring the ability of electroptic materials to phase shaft RF energy
High pressure refolding of protein aggregates and inclusion bodies
Bi-directional nail trimmer
Apparatus for and method of forming a parallel ion beam
Green tire bead
Footwear insole
Robust detection of strain with temperature correction
Integrated frequency divider