First `Absolute' Thickness Gauge for Film.A new thickness sensor A device that measures or detects a real-world condition, such as motion, heat or light and converts the condition into an analog or digital representation. An optical sensor detects the intensity or brightness of light, or the intensity of red, green and blue for color systems. for blown film may be the only absolute thickness-measuring device on the market, says Plast-Control Inc., Newburyport, Mass. Mounted on the layflat, the Profile Sensor, a redesign re·de·sign tr.v. re·de·signed, re·de·sign·ing, re·de·signs To make a revision in the appearance or function of. re of an earlier air-cushion gap technology, floats a constant distance off the film on air pressure. The sensor moves up or down as the thickness of film changes. Sensor movement is measured by a light source passing through a glass plate etched etch v. etched, etch·ing, etch·es v.tr. 1. a. To cut into the surface of (glass, for example) by the action of acid. b. in 0.1 micron micron: see micrometer. One micrometer, which is one millionth of a meter or approximately 1/25,000 of an inch. The tiny elements that make up a transistor on a chip are measured in micrometers and nanometers. See process technology. increments. Plast-Control installed the first Profile Sensor four months ago in Germany to control thickness of tacky film. Feedback from the gauge adjusts cooling air on the bubble. |
|
||||||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion