Recording web tension control

Claim 2

IThe combination with a reproducer system of the type having means for transporting an elongated record web along a given path, rotatable web supply means adapted to have said web initially disposed thereon, and in which said web supply means is rotated in a given direction wherein a predetermined portion of said web is withdrawn from said web supply means and disposed in said path for cooperation with said transport means, comprising; means including sensing means responsive to the rotation of said web supply means for providing a control signal having a value indicative of the amount said supply means is rotated during the withdrawing of said predetermined web portion, drive means coupled to said web supply means to oppose when energized further payout of said web from said supply means as said web supply means is rotated in said given direction, and means active upon the completion of said withdrawing of said predetermined portion of said web for energizing said drive means in accordance with said control signal.

Claim 3

The invention according to claim 1, wherein: said third means includes tachometer means coupled to said web supply means providing an output in response to the revolution of said web supply means, counting means coupled to said tachometer means and responsive to said output for providing a further output indicative of the number of revolutions of said web supply means when said web portion is withdrawn, and means coupled to said counting means for providing said control signal with a value determined in response to said further output.

Claim 4

In a reproducer system of the type having, means for transporting an elongated record web along a given path, rotatable web supply means adapted to have said web initially disposed thereon, means for withdrawing a predetermined portion of said web from said supply means with said web supply means being rotated thereby, to dispose said web portion in said path for movement of said web thereover by said transport means and drive means coupled to said web supply means, said drive means being arranged to provide when energized a rotation urging force opposing payout of said web from said supply device, the combination comprising: rotation sensing means coupled to said web supply means for providing in response to each revolution of said supply means a first signal, means including counting means for providing a second signal whose value is determined in accordance with an input applied to said counting means, means coupled to said web withdrawing means for applying said first signal to said counting means during the interval said predetermined web portion is withdrawn from said supply means, means coupled to said transport means for providing a further signal in response to the initiation of movement of said web through said path by said transport means, and switching for energizing said drive means with said second signal in response to the occurrence of said further signal.

Claim 5

In a reproducer system of the type having, means for transporting an elongated record web along a given path, rotatable web supply means adapted to have said web initially disposed thereon, means for withdrawing a predetermined portion of said web from said supply means with said web supply means being rotated thereby, to dispose said web portion in said path for movement of said web thereover by said transport means and drive means coupled to said web supply means, said drive means being arranged to provide when energized a rotation urging force opposing payout of said web from said supply device, the combination comprising: rotation sensing means coupled to said web supply means for providing in response to each revolution of said supply means a first signal, means including counting means for providing a second signal whose value is determined in accordance with an input applied to said counting means, means coupled to said web withdrawing means for applying said first signal to said counting means during the interval said predetermined web portion is withdrawn from said supply means, means coupled to said transport means for providing a further signal in response to the initiation of movement of said web through said path by said transport means, and switching for energizing said drive means with said second signal in response to the occurrence of said further signal.

Claim 6

The invention according to claim 3, wherein; said means coupled to said web withdrawing means includes, signal generating means for providing third and fourth signals, said third and fourth signals being present respectively at the beginning and termination of the withdrawal of said predetermined web portion, gating means coupled to said rotation sensing means and responsive to said third signal to cause said first signal to be applied to said counting means, with said gating means responsive to said fourth signal for decoupling said first signal from said counting means.

Claim 7

The invention according to claim 4, wherein; said first signal comprises a train of pulses, said means for providing said second signal includes digital counting means for providing an output in digital form representing the summation value of the number of pulses of said pulse train applied to said counting means and converting means coupled to said counting means and responsive to the output thereof for providing a continuous value reference signal whose magnitudE is determined by the summation value output of said counting means.

Claim 8

The invention according to claim 5, wherein, said counting means is arranged to provide a recurrent count cycle between fixed limits in which said output value decreases within a given cycle in response to an increasing number of input pulses applied to said counting means, and further including means coupled to said counting means and responsive to said third signal for initially disposing said counting means at a predetermined value in said count cycle which value lies between said limits.

Claim 9

The combination with a reproducer system of the type for transducing information with an elongated record web which is transported along a given path, said system including means adapted to receive a web storage cartridge having first and second reels rotatably mounted therein; said first reel having a supply of said web wound thereon with a free end of said web secured to said second reel, and drive means for said first and second reels, said drive means for said first reel being arranged when energized to apply a force to said first reel which opposes payout of said web from said reel, comprising; means for engaging said web in said cartridge, means for moving said engaging means to withdraw said web from said cartridge including a given portion of said web on said first reel with said first reel being rotated thereby, means including rotation sensing means coupled to said first reel for providing a first signal having a value indicative of the extent of rotation of said first reel during withdrawal of said web from said reel, means responsive to the movement of said engaging means for providing a further signal when said given portion of said web is withdrawn from said first reel, and means responsive to said further signal for energizing the drive means of said first reel in accordance with the value of said first signal.

Claim 10

The combination with a reproducer system of the type for transducing information with an elongated record web which is transported along a given path, said system including means adapted to receive a web storage cartridge having first and second reels rotatably mounted therein; said first reel having a supply of said web wound thereon with a free end of said web secured to said second reel, and drive means for said first and second reels, said drive means for said first reel being arranged when energized to apply a force to said first reel which opposes payout of said web from said reel, comprising; means for engaging said web in said cartridge, means for moving said engaging means to withdraw said web from said cartridge including a given portion of said web on said first reel with said first reel being rotated thereby, means including rotation sensing means coupled to said first reel for providing a first signal having a value indicative of the extent of rotation of said first reel during withdrawal of said web from said reel, means responsive to the movement of said engaging means for providing a further signal when said given portion of said web is withdrawn from said first reel, and means responsive to said further signal for energizing the drive means of said first reel in accordance with the value of said first signal.