US 7,708,176 B2 · Web transportation guiding apparatus and method

Abstract

A guiding apparatus and method for a shift generated by a web during web transportation is provided, in which a coarse position guiding module and a fine position guiding module function to directly adjust the web so as to compensate the shift occurred during the process of transportation according to a position of the web. By means of monitoring a location of the fine position guiding module at any time, a reference of the coarse position guiding module will be adjusted when the location of the fine position guiding module satisfies the condition defined in the guiding method, so as to change a position where the web enters into the fine position guiding module.

Claims25

Dependent claims

A web transportation guiding apparatus, comprising:

a coarse position guiding module having an adjustment precision approximately in a range of hundreds of micrometers, for determining a position of a specific position on a web according to a reference, so as to compensate a shift generated by the web during a transportation;
a fine position guiding module having a control precision in a range of tens of micrometers and disposed at one side of the coarse position guiding module, for compensating the shift generated by the web during the transportation according to the position of the specific position on the web;
and
a control module, for determining whether to send a control instruction to the coarse position guiding module according to a position of the fine position guiding module, so as to change the reference.

1 more element

Dependencies are inferred from the claim text.

Web transportation guiding apparatus and method

Life of this patent

Web transportation guiding apparatus and method

Life of this patent

Abstract

Claims25