Device for transferring magnetic signals from a master sheet to magnetic sheets

Claim 1

A device for magnetically transferring magnetic signals of a master sheet having a spiral recording track to magnetic sheets comprising a master sheet stand fixedly mounted on said device and having projections for accurately holding said master sheet in position, intermittent feed means for intermittently feeding the magnetic sheet from a rolled magnetic sheet so as to Overlay said magnetic sheet upon said master sheet, means for rotatably supporting said rolled magnetic sheet, a pressure plate for pressing said magnetic sheet and said master sheet against said sheet stand, thereby pressing both of said sheets against each other, means for vertically movably supporting said pressure plate so as to move toward and away from said sheet stand, means for vertically moving said pressure plate in such a manner that said pressure plate is pressed against said sheet stand in correspondence to the intermittent interruption of said intermittent feed means, punching means interposed between said sheet stand and said pressure plate for punching positioning holes through said magnetic sheet, a turntable positioned below and in concentric arrangement with said sheet stand, a plurality of magnets mounted on said turntable and arranged in a plane in parallel with both of said sheets, said magnets each being energized and rotatable with said turntable from a starting point to follow the line of said spiral recording track through an arc of less than 360* for applying magnetic fields to both of said sheets when they are pressed against each other by said pressure plate , said magnets being located adjacent a bottom surface of said master sheet, and said magnets being equiangularly spaced from each other in said plane, and said magnets being de-energized at least beyond the starting points at which the preceding magnets are energized when they are rotated, and the next starting points being displaced from the preceding starting points for every operation.

Claim 2

A device for magnetically transferring magnetic signals of a master sheet having a spiral recording track to magnetic sheets comprising a master sheet stand fixedly mounted on said device and having projections for accurately holding said master sheet in position, intermittent feed means for intermittently feeding the magnetic sheet from a rolled magnetic sheet so as to Overlay said magnetic sheet upon said master sheet, means for rotatably supporting said rolled magnetic sheet, a pressure plate for pressing said magnetic sheet and said master sheet against said sheet stand, thereby pressing both of said sheets against each other, means for vertically movably supporting said pressure plate so as to move toward and away from said sheet stand, means for vertically moving said pressure plate in such a manner that said pressure plate is pressed against said sheet stand in correspondence to the intermittent interruption of said intermittent feed means, punching means interposed between said sheet stand and said pressure plate for punching positioning holes through said magnetic sheet, a turntable positioned below and in concentric arrangement with said sheet stand, a plurality of magnets mounted on said turntable and arranged in a plane in parallel with both of said sheets, said magnets each being energized and rotatable with said turntable from a starting point to follow the line of said spiral recording track through an arc of less than 360* for applying magnetic fields to both of said sheets when they are pressed against each other by said pressure plate , said magnets being located adjacent a bottom surface of said master sheet, and said magnets being equiangularly spaced from each other in said plane, and said magnets being de-energized at least beyond the starting points at which the preceding magnets are energized when they are rotated, and the next starting points being displaced from the preceding starting points for every operation.

Claim 3

A device for magnetically transferring magnetic signals of a master sheet having a spiral recording track to magnetic sheets comprising a master sheet stand fixedly mounted on said device and having projections for accurately holding said master sheet in position, intermittent feed means for intermittently feeding separate magnetic sheets one by one so as to overlay said magnetic sheet upon said master sheet, means for supporting a stack of separate magnetic sheets, a pressure plate for pressing said magnetic sheet and said master sheet against said sheet stand, thereby pressing both of said sheets against each other, means for vertically movably supporting said pressure plate so as to move toward and away from said sheet stand, means for vertically moving said pressure plate in such a manner that said pressure plate is pressed against said sheet stand in correspondence to the intermittent interruption of said intermittent feed means, punching means interposed between said sheet stand and said pressure plate for punching positioning holes through said magnetic sheet, a turntable positioned below and in concentric arrangement with said sheet stand, a plurality of magnets mounted on said turntable and arranged in a plane in parallel with both of said sheets, said magnets each being energized and rotatable with said turntable from a starting point to follow the line of said spiral recording track through an arc of less than 360* for applying magnetic fields to both of said sheets when they are pressed against each other by said pressure plate , said magnets being located adjacent a bottom surface of said master sheet, and said magnets being equiangularly spaced from each other in said plane, and said magnets being de-energized at least beyond the starting points at which the preceding magnets are energized when they are rotated, and the next starting points being displaced from the preceding starting points for every operation.

Claim 4

A device for magnetically transferring magnetic signals of a master sheet having a spiral recording track to magnetic sheets comprising a master sheet stand fixedly mounted on said device and having projections for accurately holding said master sheet in position, intermittent feed means for intermittently feeding separate magnetic sheets one by one so as to overlay said magnetic sheet upon said master sheet, means for supporting a stack of separate magnetic sheets, a pressure plate for pressing said magnetic sheet and said master sheet against said sheet stand, thereby pressing both of said sheets against each other, means for vertically movably supporting said pressure plate so as to move toward and away from said sheet stand, means for vertically moving said pressure plate in such a manner that said pressure plate is pressed against said sheet stand in correspondence to the intermittent interruption of said intermittent feed means, punching means interposed between said sheet stand and said pressure plate for punching positioning holes through said magnetic sheet, a turntable positioned below and in concentric arrangement with said sheet stand, a plurality of magnets mounted on said turntable and arranged in a plane in parallel with both of said sheets, said magnets each being energized and rotatable with said turntable from a starting point to follow the line of said spiral recording track through an arc of less than 360* for applying magnetic fields to both of said sheets when they are pressed against each other by said pressure plate , said magnets being located adjacent a bottom surface of said master sheet, and said magnets being equiangularly spaced from each other in said plane, and said magnets being de-energized at least beyond the starting points at which the preceding magnets are energized when they are rotated, and the next starting points being displaced from the preceding starting points for every operation.