GB633509A - Improvements in or relating to apparatus for gauging film width variation - Google Patents

Improvements in or relating to apparatus for gauging film width variation

Info

Publication number
GB633509A
GB633509A GB15692/47A GB1569247A GB633509A GB 633509 A GB633509 A GB 633509A GB 15692/47 A GB15692/47 A GB 15692/47A GB 1569247 A GB1569247 A GB 1569247A GB 633509 A GB633509 A GB 633509A
Authority
GB
United Kingdom
Prior art keywords
light
film
sheets
photo
plane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB15692/47A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Cellophane Ltd
Original Assignee
British Cellophane Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Cellophane Ltd filed Critical British Cellophane Ltd
Priority to GB15692/47A priority Critical patent/GB633509A/en
Publication of GB633509A publication Critical patent/GB633509A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/046—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/0204—Sensing transverse register of web
    • B65H23/0216—Sensing transverse register of web with an element utilising photoelectric effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92133—Width or height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92247—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92942—Moulded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/50—Use of particular electromagnetic waves, e.g. light, radiowaves or microwaves
    • B65H2557/516—Polarized light

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)

Abstract

633,509. Optical gauging-apparatus. BRITISH CELLOPHANE, Ltd., and SAMWAYS, B. June 13, 1947, No. 15692. [Class 106 (ii)] Transparent birefringent film of artificial organic material travelling in a substantially fixed path is passed through an optical gauging- apparatus, utilizing polarized light, the variation in the film width being recorded on a chemically photo-sensitive sheet or film. As shown, the side edges of the film 1 pass between two optical systems consisting of constant light sources 8, 8<SP>1</SP> projecting light through narrow slits covered by ground glass covers 2, 2<SP>1</SP> over which are light-polarizing sheets 3, 3<SP>1</SP> for converting the light to plane polarized light. A second set of light-polarizing sheets 4, 41 is arranged to receive the plane polarized light and set for extinction therewith, and pairs of plane glass or metal mirrors 5, 5<SP>1</SP> are adapted to reflect any light transmitted by the means 4, 41 to form by reflection a virtual image 10 combining images 9, 9<SP>1</SP> of the edge portions of the film 1. The properties of the film 1 are such that light passing therethrough will be transmitted by the second means 4, 41. A photographic camera 6 is focused so as to record on chemically photo-sensitive film 7 a photograph of the combined image 10. The film 7 is continuous and drawn forward either at a constant speed, or at a speed bearing a constant relation to that of the machine for casting the transparent film 1. Scales inscribed in the slits of the light sources 8, 81 are also photographed. In a modification, above each side edge of the transparent film 1 is arranged a system comprising a light source, a collimating lens, and a light-polarizing sheet, but the right-hand system covers more of the film edge than the left-hand system. Further light-polarizing sheets are arranged below the film and set for extinction with the first sheets, and plane mirrors, which are staggered vertically, are positioned to reflect any light transmitted by the second sheets either on to a moving photo-sensitive web of paper or on to a slit in an opaque screen which is continuously photographed. The reflections from the two mirrors are adjusted so that when projected they lie end to end on the paper web or screen.
GB15692/47A 1947-06-13 1947-06-13 Improvements in or relating to apparatus for gauging film width variation Expired GB633509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB15692/47A GB633509A (en) 1947-06-13 1947-06-13 Improvements in or relating to apparatus for gauging film width variation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15692/47A GB633509A (en) 1947-06-13 1947-06-13 Improvements in or relating to apparatus for gauging film width variation

Publications (1)

Publication Number Publication Date
GB633509A true GB633509A (en) 1949-12-19

Family

ID=10063729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15692/47A Expired GB633509A (en) 1947-06-13 1947-06-13 Improvements in or relating to apparatus for gauging film width variation

Country Status (1)

Country Link
GB (1) GB633509A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674917A (en) * 1951-03-06 1954-04-13 Gen Electric Noncontacting width gauge
EP1174378A2 (en) * 2000-07-20 2002-01-23 NexPress Solutions LLC Device for detecting the position of an edge of a transparent material, control of edge of running web and printing machine
CN115753828A (en) * 2023-01-09 2023-03-07 苏州高视半导体技术有限公司 Edge three-side detection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674917A (en) * 1951-03-06 1954-04-13 Gen Electric Noncontacting width gauge
EP1174378A2 (en) * 2000-07-20 2002-01-23 NexPress Solutions LLC Device for detecting the position of an edge of a transparent material, control of edge of running web and printing machine
EP1174378A3 (en) * 2000-07-20 2004-05-12 NexPress Solutions LLC Device for detecting the position of an edge of a transparent material, control of edge of running web and printing machine
CN115753828A (en) * 2023-01-09 2023-03-07 苏州高视半导体技术有限公司 Edge three-side detection device

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