Optics: measuring and testing – By monitoring of webs or thread
Patent
1996-08-14
1998-09-08
Font, Frank G.
Optics: measuring and testing
By monitoring of webs or thread
356381, 356385, 25055912, 25055527, G01N 2184
Patent
active
058052917
ABSTRACT:
The invention is directed to an apparatus for measuring the thickness of flexible sheet material such as cloth, carpet, paper, sheet metal or plastic, for example. The apparatus includes a break member over which the sheet material is folded and advances. The apparatus also includes a light source and a light sensor that are preferably included in a laser scan micrometer. The apparatus also includes a carriage movable in a direction parallel to the break member. The light source is mounted to the carriage so that it opposes one side of the break member, and casts a shadow whose linear extent is indicative of the sheet material's thickness. The light sensor is mounted to the carriage on the opposite side of the break roller from that on which the light source is positioned. The light sensor and the light source can thus be used to generate sheet material thickness data at any predetermined position across the sheet material. The apparatus can include a traversing unit that drives the carriage to traverse the sheet material. The traversing unit is controlled by the apparatus' traverse controller. The apparatus can also include a processor, a user interface, a memory and a display, that can be used to generate various displays. An embodiment of the apparatus additionally includes an inductive gauging sensor mounted to the carriage, that is used with the light sensor to generate sheet material thickness data. The invention also includes a related method.
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Caillier Scott M.
Calvin Timothy Wayne
Schneider Edward Conrad
Font Frank G.
Smith Zandra V.
Systronics, Inc.
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