Sheet feeder synchronization system having error correction means
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 1989
Grant Date -
N/A
app pub date -
Jul 7, 1987
filing date -
Jul 7, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and corresponding apparatus for identifying a series of lengths along a moving web are disclosed, especially for use in registering sheets with the web. The method is used with a device operating on the web including an element rotating synchronously with advance of the web. The method includes generating a data signal in response to rotation of the element, the signal including a series of pulses, with each pulse corresponding to an increment of rotation. A first of the lengths is converted to a first real number of increments, which number is adjusted to a first integer number of increments. The error is retained. A first length is then identified as corresponding to the first integer number of increments within the data signal. A second length is then converted to a second real number of increments. This value is adjusted to an integer number, and the cumulative error is used to correct the value if necessary. The second length is identified along the web as corresponding to the second integer number of increments within the data signal.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully