G - Physics – 01 – N
Patent
G - Physics
01
N
73/57
G01N 21/47 (2006.01) G01N 21/86 (2006.01)
Patent
CA 1139962
ABSTRACT OF THE DISCLOSURE An apparatus to measure select properties such as color, brightness or gloss, of a moving sheet, is in- sensitive to flutter in the sheet, The apparatus comprises a housing to one side of said sheet. A source is located in the housing; the source is capable of emitting a beam of electromagnetic radiation which is aligned to impinge the sheet, The radiation is selected such that it is capable of being absorbed and being reflected by the select properties of the sheet. A collector is also located in the housing; the collector is capable of receiving a portion of the beam reflected from the sheet. A detector capable of measuring the select properties of the sheet based upon the radiation received by the collector is also provided, The housing is held at a constant distance from the sheet by a stream of fluid from the housing directed to impinge the sheet in a direction substan- tially perpendicular to the sheet. A standardization member is to the other side of the sheet. The standardi- zation member is also held at a constant distance from the sheet by a stream of fluid from the member directed to impinge the sheet along a direction substantially perpendicular to the sheet and in linear alignment with the stream of fluid from the housing.
366120
Howarth John J.
Larsen Tor G.
Measurex Corporation
Smart & Biggar
LandOfFree
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