GB671961A - Improvements in or relating to methods of and apparatus for grinding flat glass on both faces simultaneously - Google Patents

Improvements in or relating to methods of and apparatus for grinding flat glass on both faces simultaneously

Info

Publication number
GB671961A
GB671961A GB2205549A GB2205549A GB671961A GB 671961 A GB671961 A GB 671961A GB 2205549 A GB2205549 A GB 2205549A GB 2205549 A GB2205549 A GB 2205549A GB 671961 A GB671961 A GB 671961A
Authority
GB
United Kingdom
Prior art keywords
bars
discs
channels
glass
disc
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
GB2205549A
Inventor
Frederic Barnes Waldron
James Harris Griffin
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.)
Pilkington Group Ltd
Original Assignee
Pilkington Brothers 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
Priority to NL78431D priority Critical patent/NL78431C/xx
Application filed by Pilkington Brothers Ltd filed Critical Pilkington Brothers Ltd
Priority to GB2205549A priority patent/GB671961A/en
Priority to FR1026182D priority patent/FR1026182A/en
Priority to BE497723D priority patent/BE497723A/xx
Priority to DES18749A priority patent/DE832719C/en
Publication of GB671961A publication Critical patent/GB671961A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
    • B24B7/24—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding or polishing glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/02—Wheels in one piece

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

671,961. Grinding sheet glass. PILKING- TON BROS., Ltd. Aug. 24, 1950 [Ang. 24, 1949], No. 22055/49. Class 60. A method of grinding horizontally-disposed flat glass on both faces simultaneously is characterized in that the underface is ground by a rotary disc having an annular series of curved bars, the circumferential width of each bar and the angle which its leading edge makes to a radius at any point increasing continuously from the inner to the outer end of the bar so that abrasive fluid supplied to the centre of the annulus is driven between the bars where, it is subjected to a lifting force which distributes it along the entire length of the upper surfaces of the bars. This lifting force is produced by the configuration of the bars 12, 13 the leading faces of which are inclined to the upper surfaces at an obtuse angle which diminishes continuously from the inner to the outer end of the bar. The abrasive fluid is fed upwardly through a shaft 22 into the centre 17 of the annulus where it is driven outwards into the channels 15 under the combined effect of the hydrostatic head and centrifugal force. The disc is preferably constructed with.a rim 14 having a surface of relatively soft material and is made to a diameter slightly in excess of the width of the ribbon of glass so that connecting channels 16 are progressively uncovered as the disc rotates to allow abrasive fluid to move along the channels 15. If the disc is constructed without a rim, soft metal plugs may be inserted in the channels 15 to regulate the flow. The discs are arranged in co-axial pairs along the length of the glass and use progressively finer abrasive as the polishing stage is approached. In the smooth grinding discs the bars are of the same width as the channels while in the coarse grinding discs they may be twice as wide. The increase in the width of the bars may be from 5 to 10 cms. in proportion to the radius and the increase in the angle of the leading edge from 55 to 70 degrees. On the lower discs the leading face angle varies from 110 to 130 degrees at the centre of the annulus to 93 to 113 degrees at its outer diameter. The upper discs may have a perpendicular leading face since the distribution of abrasive is assisted by gravity. Rollers on opposite sides of the glass feed it between the discs which rotate at about 60 r.p.m.
GB2205549A 1949-08-24 1949-08-24 Improvements in or relating to methods of and apparatus for grinding flat glass on both faces simultaneously Expired GB671961A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL78431D NL78431C (en) 1949-08-24
GB2205549A GB671961A (en) 1949-08-24 1949-08-24 Improvements in or relating to methods of and apparatus for grinding flat glass on both faces simultaneously
FR1026182D FR1026182A (en) 1949-08-24 1950-08-21 Improvements to processes and apparatus for smoothing flat glass on both sides at the same time
BE497723D BE497723A (en) 1949-08-24 1950-08-23
DES18749A DE832719C (en) 1949-08-24 1950-08-24 Grinding device for the simultaneous grinding of both surfaces of a glass ribbon continuously moving in a horizontal plane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2205549A GB671961A (en) 1949-08-24 1949-08-24 Improvements in or relating to methods of and apparatus for grinding flat glass on both faces simultaneously

Publications (1)

Publication Number Publication Date
GB671961A true GB671961A (en) 1952-05-14

Family

ID=10173169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2205549A Expired GB671961A (en) 1949-08-24 1949-08-24 Improvements in or relating to methods of and apparatus for grinding flat glass on both faces simultaneously

Country Status (5)

Country Link
BE (1) BE497723A (en)
DE (1) DE832719C (en)
FR (1) FR1026182A (en)
GB (1) GB671961A (en)
NL (1) NL78431C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2345255A (en) * 1998-12-29 2000-07-05 United Microelectronics Corp Chemical-mechanical polishing pad.
EP1366858A1 (en) * 2001-01-05 2003-12-03 Seiko Epson Corporation Polisher and polishing method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2859565A (en) * 1955-01-31 1958-11-11 Pilkington Brothers Ltd Apparatus for grinding flat glass on both faces simultaneously
BE547473A (en) * 1955-05-03
DE1030219B (en) * 1956-10-30 1958-05-14 Werner Osenberg Dr Ing Surface grinding device working with loose grain
DE4240476A1 (en) * 1992-12-02 1994-06-16 Winter & Sohn Ernst Grinding wheel for machining workpiece surfaces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2345255A (en) * 1998-12-29 2000-07-05 United Microelectronics Corp Chemical-mechanical polishing pad.
US6120366A (en) * 1998-12-29 2000-09-19 United Microelectronics Corp. Chemical-mechanical polishing pad
GB2345255B (en) * 1998-12-29 2000-12-27 United Microelectronics Corp Chemical-Mechanical Polishing Pad
EP1366858A1 (en) * 2001-01-05 2003-12-03 Seiko Epson Corporation Polisher and polishing method
EP1366858A4 (en) * 2001-01-05 2006-03-15 Seiko Epson Corp Polisher and polishing method

Also Published As

Publication number Publication date
BE497723A (en) 1951-02-23
DE832719C (en) 1952-02-28
FR1026182A (en) 1953-04-24
NL78431C (en)

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