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
Kit and method for the capture of tumor cells
Image forming apparatus and control method therefor
Magnetic disk and manufacturing method thereof
Gemstone
Anti-proliferative and anti-inflammatory agent combination for treatment of vascular disorders with an implantable medical device
Scalable pixel coverage function-map
Display stand for a mobile tablet computer
  Randomly Featured Patents
Method, apparatus and computer program product for optimizing an integrated circuit layout
Fluid control means for vehicle suspension system
Device for threading a paper web
Case for magnetic tape cassette
Preventing undesired voicemails
Modular bay enclosure removable card method and system
Control halter with sliding headpiece
Colorable elastomeric composition
Method for binding compounds to textiles
High temperature packer for well conduits