Boots – shoes – and leggings
Patent
1987-07-07
1989-05-30
Gruber, Felix D.
Boots, shoes, and leggings
242186, 364562, G06F 1546, G01B 704, B65H 2318
Patent
active
048356980
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.
REFERENCES:
patent: 3606117 (1971-09-01), Fagan et al.
patent: 3713571 (1973-01-01), Simonton
patent: 4143566 (1979-03-01), Laciak et al.
patent: 4316566 (1982-02-01), Arleth et al.
Beery Jack
Mikolajczak Matthew M.
Boshinski Thomas A.
Gruber Felix D.
The Mead Corporation
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