Patent ID: 7320814
Filing Date: 2008-01-22
Classification: B05B

Abstract:
1. A method of spraying a liquid in patterns on a moving web, the method comprising: directing at least one intermittent spray of liquid onto the web to form a pattern on the web; sensing a position of a leading edge of at least one of the spray and the pattern relative to one or more references on the web; generating a first correction signal when the leading edge of the pattern is out of position relative to the one or more references; adjusting the spray of liquid in response to the first correction signal to correctly position a leading edge of a subsequent pattern relative to one or more subsequent references on the web; sensing a position of a trailing edge of at least one of the spray and the pattern relative to one or more references on the web; generating a second correction signal when the trailing edge of the pattern is out of position relative to the one or more references; and adjusting the spray of liquid in response to the second correction signal to correctly position a trailing edge of subsequent patterns relative to one or more subsequent references on the web.