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公开(公告)号：CA1189967A
公开(公告)日：1985-07-02
申请号：CA379178
申请日：1981-06-05
Applicant: IBM
Inventor： MCMURTRY DAVID H , CRAWFORD ROY P , GILOVICH PAUL A
Abstract: A method and apparatus is disclosed for automatically threading web material, e.g., magnetic tape, from a replacable supply reel to a non-replacable take-up reel of a web transport device, e.g., a reel-to-reel type magnetic tape drive, in which the web path is nonlinear and relatively complex as a result of various components, e.g., magnetic transducer tape guides, which act on the web while it is being transported. The apparatus comprises a coupling device and a mechanism for moving and guiding the coupling device between the supply reel and the take-up reel. The coupling device couples to a leader block attached to the tape at the supply reel. The mechanism moves and guides the coupling device to thread the tape over the predefined tape path and positions the leader block wholly within a radially disposed slot in the hub of the take-up reel. The coupling device remains attached to the moving mechanism and coupled to the leader block when the leader block is rotated with the take-up reel. The method is characterized by the steps of maintaining the relationship of the coupling device to the leader block and to the moving and guiding means during rotation of the take-up reel when the leader block is positioned in the radially disposed slot of the take-up reel.
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公开(公告)号：CA1263274A
公开(公告)日：1989-11-28
申请号：CA506438
申请日：1986-04-11
Applicant: IBM
Inventor： CRAWFORD ROY P , WATROUS ROBERT B
Abstract: A pump includes a pair of circular metal bellows rigidly secured to the pump housing at the perimeter of their accordion-like ring structures and interconnected at their centers so as to he capable of flexing in phase. An electrical coil is attached to the interconnected bellows and is axially movable with the bellows. The coil is surrounded by a permanent magnet structure secured to the pump housing. Each bellows communicates with an associated fluid chamber which has a valve structure for the inlet and outlet of fluid. The coil is electrically connected to an alternating current power supply, the connection being made through the electrically conductive bellows. The bellows flex in phase in the presence of the alternating current to the coil and thus alternately pull fluid in and force fluid out of the respective fluid chambers. Since the fluid chambers are connected to a common fluid output and since the bellows axially flex: in phase, there are two pressured pulses per pump cycle.
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