(under the class definition) Subject matter for inspecting or testing webs or threads of material including apparatus to support and transport the web under, over, or through an inspection station; a light source with optical means (which may include flying spot scanners) to direct the light through, around, or reflective from the web or thread; visual and photoelectric means (including comparator types) to detect changes in the light intensity produced by the light coacting with the web or thread; and with the photoelectric alternative an indicator responsive to the photoelectric means to not quantitatively or qualitatively variations in optical properties or condition.
(1) Note. When an optical test is claimed on a web or thread including an indicator, qualitative or quantitative, actuated in response to the test, classification is here rather than in Class 250, subclasses 548 and 559.01+.
(2) Note. When the claims include a light source for the test, a support for the material tested, and a photosensitive detector without the indicator classification is in this Class 356 as opposed to Class 250.
(3) Note. The claimed terms "reject means", "reject mechanism", or "indicator means" do not necessarily qualify as an indication means for this class as these terms could be a relay mechanism or other switch mechanism which is not a qualitative or quantitative signalling means for this class. A single disclosure to an indicator, qualitative or quantitative with the term reject means claimed will be classified in this subclass 429 provided its indicator is not part of a more comprehensive arrangement classified elsewhere. For example, see Class 209.
SEE OR SEARCH THIS CLASS, SUBCLASS:
242.1, for the counting of threads in woven fabrics where the fabric is stationary.
384+, for the determination of the width or diameter of a web or filament.
SEE OR SEARCH CLASS 73, Measuring and Testing,
159+, for the testing or inspection of sheet material, including woven fabric materials where no optical tests, per
se, are performed.
162, Paper Making and Fiber Liberation,
198, and 252+ for process and apparatus wherein an optical test may be utilized to control a paper making or fiber liberation process.
226, Advancing Material of Indeterminate Length,
3, and 15+ for processes and apparatus which utilize optical tests to laterally position a moving web.
250, Radiant Energy,
439+, for ray energy devices combined with a support for an article; subclasses 361+ for testing articles by using fluorescent or phosphorescent radiation; subclasses 336+ for the testing of articles by invisible radiations; subclasses 548, 559, and 571 for apparatus to significantly illuminate weblike material and to detect the illumination as modified by the weblike material; subclasses 229+ for adjustable light masking devices; and subclass 237 where the light masking devices are not adjustable. See also (1) and (2) Notes above.
340, Communications: Electrical,
227+, and 259+ for devices which are responsive to visible light tests to denote and indicate, by means of an electrically operated bell or light, the condition of a web, including motion picture film.
346, Recorders, 33, for nominal optical test devices which operate a recorder of the Class 346 type where there is novelty in the recorder, per se.
352, Optics: Motion Pictures,
105+, for continuously moving films with optical viewers involving a periodic displacement of the optical axis for the purpose of inspecting the films, including flaw detection.
396, Photography,
567+, for fluid-treating apparatus where a light test is made to determine the value of light contrast of the exposed film to regulate the apparatus.
430, Radiation Imagery Chemistry: Process, Composition, or Product Thereof, process involving exposure of a radiation imagery receiver.
