Servo valve

Advancing material of indeterminate length – With material-responsive control means – To position material laterally

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

226 22, 2425631, 13762518, 137595, 251 612, B65H 4300, F17D 31128

Patent

active

059380985

ABSTRACT:
A positive pressure operated servo apparatus for lateral alignment of a continuous web of paper, plastic, textiles and other materials which are being processed at windup, unwind, printing, coating, folding and slitting stations, or other intermediate points in the machine process. The apparatus includes an air source communicating with a sensor and servo valve which regulates a double-acting air actuator having an output member to move a web positioning assembly. The servo valve is regulated by a diaphragm that is controlled by a pneumatic correction signal force from a low pressure sensor circuit and is arranged under the influence of such signal force to selectively position a valve element relative to two orifice openings to provide differential air pressure proportional to error to operate the actuator to produce actuator movement proportional to the error to correct and maintain the position of the web.

REFERENCES:
patent: 1615415 (1927-01-01), Tandel
patent: 2814487 (1957-11-01), Medkeff
patent: 3071157 (1963-01-01), Robertson et al.
patent: 3098595 (1963-07-01), Shelton
patent: 3244340 (1966-04-01), Fife et al.
patent: 3310942 (1967-03-01), Stanford
patent: 3563484 (1971-02-01), Bray, Jr.
patent: 3599849 (1971-08-01), Callan
patent: 3693855 (1972-09-01), Bonner
patent: 3727817 (1973-04-01), Tibavido
patent: 3908881 (1975-09-01), McCann
patent: 4054251 (1977-10-01), Henderson et al.
patent: 4073448 (1978-02-01), Kolosov
patent: 4609012 (1986-09-01), Shelton
patent: 4655378 (1987-04-01), DuFour
patent: 5664738 (1997-09-01), Fife

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Servo valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Servo valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Servo valve will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-306465

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.