Boots – shoes – and leggings
Patent
1979-11-28
1982-06-01
Ruggiero, Joseph F.
Boots, shoes, and leggings
72 8, 72 11, 364472, G06G 766, B21B 3700
Patent
active
043331483
ABSTRACT:
A draw control system for a process line is provided wherein the process line comprises a number of stand or sections having the speeds N.sub.1, N.sub.2 -N.sub.n. The stands are provided with a master reference voltage V which may be modified at each section to change its speed to N.sub.n +.DELTA.N.sub.n where n=1-2, 3-n. One section is selected as a no-draw section, i.e., the master voltage is applied without change to the speed regulator for that section to determine its speed, say N.sub.1. All succeeding sections comprise non-inverting summation operational amplifiers arranged in cascade respectively so that the output of one determines the speed for its section and this output is also applied to the input of the non-inverting summation amplifier for the succeeding section. With this arrangement all perturbations ripple on through the draw control system so that interstand tension is maintained under all conditions. Thus, if the master reference voltage is changed to V+.DELTA.V then ##EQU1## and if N.sub.n-2 is changed to N.sub.n-2 +.DELTA.N.sub.n-2 in order to increase the interstand tension between stands N.sub.n-2 and N.sub.n-1 then the speed N.sub.n is changed to .DELTA.N.sub.n +.DELTA..sub.n and .DELTA.N.sub.n =.DELTA.N.sub.n-1 .
The input to the each cascaded non-inverting summation operational amplifier includes a scale factor or multiplier K which sets the range for the change in speed for each section respectively.
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patent: 4011743 (1977-03-01), Peterson et al.
patent: 4063438 (1977-12-01), Sekiguchi
patent: 4080656 (1978-03-01), Jonsson et al.
patent: 4087859 (1978-05-01), Anbe
patent: 4137742 (1979-02-01), Tanifuji et al.
Lorin C. M.
Ruggiero Joseph F.
Westinghouse Electric Corp.
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