Appeal No. 1998-1825
Application No. 08/658,014
clockwise or counterclockwise about the axis of
rockable shaft 25 . . . Thus, when the tension in
the web W exceeds the predetermined value, the speed
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of movement of belt 66 is increased and
correspondingly increases the speed at which the web
is unwound from the supply roll 11, thereby
restoring the desired value of web tension. On the
other hand, when an insufficient tension is detected
by floating roller 23, the speed of movement of belt
66 is decreased and correspondingly decreases the
speed at which the web W is unwound from roll 11
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until the desired value of tension is restored in
the web (col. 6, lines 19-39).
Scanning head (95) and selector switch (99) compare
signals from respective register marks (R) on each web such
that when the register mark (R) of each web is ahead of its
correct position, reversible motor (90) is rotated to
effectively displace the register mark (R) in the direction
opposite to the travel of the web. If the register mark is
detected as lagging behind its correctly registered position,
the motor (90) is turned in the opposite direction in order to
restore the web to its proper position. When the web register
control acts to advance the web in response to register error,
there is a resulting increase in tension in the web between
the drive rollers (28 and 29) and supply roll (11) and this
increase is detected by floating roller (23) to cause an
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