Apparatus for controlled perforation of moving webs with fixed focus laser beam
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 27, 1981
Issued Date -
N/A
app pub date -
May 10, 1979
filing date -
May 10, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system for precision perforation of moving webs employing a pulsed, fixed focus laser beam wherein the laser pulses are automatically controlled in pulse repetition frequency and in pulse width to provide a desired preset web porosity. Closed loop circuitry responsive to web speed, sensed web porosity, and a porosity preset signal provides the precise system control needed to produce and maintain the preset porosity over a wide range of system variables. The illustrative embodiment described is particularly useful for perforating paper, film, and like materials where a high degree of product uniformity and porosity control is desired.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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