US2197104A - Method and apparatus for polishing traveling flat glass - Google Patents

Method and apparatus for polishing traveling flat glass Download PDF

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US2197104A
US2197104A US123816A US12381637A US2197104A US 2197104 A US2197104 A US 2197104A US 123816 A US123816 A US 123816A US 12381637 A US12381637 A US 12381637A US 2197104 A US2197104 A US 2197104A
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strip
tools
group
polishing
operating
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US123816A
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Griffin James Harris
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Pilkington Group Ltd
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Pilkington Brothers Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
    • 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
    • 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
    • B24B7/26—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 for simultaneously grinding or polishing opposite faces of continuously travelling sheets or bands

Definitions

  • This invention relates to polishing method and apparatus operating to polish both surfaces of traveling flat glass and has for its object a form of polishing apparatus of reduced cost.
  • polishing apparatus operating to polish simultaneously both surfaces of a traveling strip of fiat glass
  • the tools operate in pairs, one of each pair on one surface and one opposite to it on the other surface, so that each serves to support the strip against the pressure exerted by the other.
  • the strip is cooled by the water and by conduction through the iron operative surface, but in the case of -tools employing a polishing medium such as rouge with a felt or other non-metallic operative surface (hereinafter termed polishing tools) with which only little water can be used, the glass becomes heated to such a degree that it is liable to crack. Undue heating can be avoided by reducing the energy supplied to the polishing tools, but this means that the number of tools has to be increased, with consequent increase in the cost of the apparatus.
  • the polishing tools are in two pluralities, one plurality operating on one side of the strip andtheother on the other side of another portion of the strip, and means are provided opposite each plurality for supporting the strip against the pressure exerted by the tools of-the plurality.
  • the supporting means may be a roller bed or it may be a series of tables, and the tables may slide on or under guides with means for removing a table from the series at the end of each plurality and adding it to the series at the start of the said plurality.
  • Figure 1 is a side elevation of a portion of a grinding and polishing machine, shown diagrammatically in that the supporting framework and driving gear are omitted
  • Figures 2 and 2a are similar views of an alternative constructional form of the in ention, FigureZa being a continuation of Figure 2;
  • Figure 3 is an end view of Figure 2 from the left, parts being omitted;
  • Figure 4 is a section taken on the line 44 of Fig. 2.
  • the continuous strip of 6 glass I passes through a plurality of pairs of grinding tools, the two tools of each pair operating on the 'upper and under sides of the strip respectively, so that each serves to support the strip against the pressure exercised by the 10 other; the last pair of grinding tools of the machine is shown at 2.
  • the strip is driven through the machine by pairs of driving rollers 3.
  • the direction of travel of the strip is from left to right. To the right of the last pair of grinding tools 2, where the strip is shown broken away,
  • a suitable length is left free for washing the strip free of sand.
  • the strip I then passes under .a roller bed 4, which serves as support against the pressure of the polishing tools 5 operating on the underside of the strip.
  • the strip then passes over a roller bed 6, which forms a support against the pressure of the polishing tools I operating on the upper side of the strip.
  • Three polishing tools 5 and three polishing tools I are shown in the drawing, but in practice from twelve to fifteen tools are required to operate on each side of the strip. The whole number of tools required to operate on one side of the strip may be in one group, followed by a group of those required to operate on the other side, or the two kinds of tools may be in smaller groups, alternating one with the other.
  • rollers I and 6 may be idle rollers or they may be driven at the speed of travel of the strip.
  • a driven belt may be employed as direct support for the strip, the belt passing between the strip and the roller beds 4 and 6.
  • the pairs of driving rollers 3 are then not employed in the polishing section of the machine. 4
  • a series of tables 8 is employed to support the strip I against the pressure of the polishing tools 5 and I.
  • the tables 8 slide on upper guides 9 in Figure 2 and on lower guides III in Figure 2a.
  • the end view of a table 8 is seen in Figure 3 in a position above the machine, while being transported.
  • the guides 9 engage the table at the surfaces II.
  • Each table is provided with a rack I2, which is engaged by a pinion I3, shown in dotted lines in Figures 2 and 211.
  • the series of tables is driven along the guides 9.
  • Each table 8, after-it has a second elevator IT.
  • a table 8 is shown in position in the elevator II at the left hand of Figure 2, and the end view thereof is shown in Figure 3.
  • the elevators l5 and I! support the table by rollers l8 engaging it at its edges, the rollers l8 being far enough apart to pass over the strip and its supporting rollers l4.
  • the tables may be linked together to form an endless chain, the tables being supported by guides or rollers when supporting the stripagainst the pressure of the tools.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of eachpair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operatingsimultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and non-polishing means arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group-so as thereby to operate on the traveling strip at different portions of its length, and a series of tables arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
  • Apparatus as in claim 2 comprising guides adapted to support the tables and meansfor removing a table from the series of tables at the end of each group of tables and adding it to the V tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a plurality .of moving supports arranged directly opposite each group of tools and adapted to support the strip against the pressure exerted by the tools of the group.
  • Apparatus for polishing a continuousstrip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a bed arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group, the portions of the bed contacting with the strip moving with the strip.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising means adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of disc tools made of cast iron operating with their flat surfaces in contact with the glass with sand and water, the two tools of each pair operating on the two sides of the ammo-z strip one opposite to the other, two groups of disc tools covered with a non-metallic material operating with their flat surfaces in contact with the glass with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a plurality of moving supports arranged directly opposite each group of tools and adapted to support the strip against the pressure exerted by the tools of the group.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other and being adapted to conduct away from the glass heat generated during the grinding operation, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating I simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools I of one group being. offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and non-polishing means arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the'strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being oilset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a roller bed arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
  • a method of polishing a continuous strip of glass on both sides simultaneously while the strip is in motion characterized in that the simultaneous polishing operations are effected in offset regions on opposite sides of the strip without' reversing the strip face for face.
  • a method of polishing a continuous strip of glass on both sides simultaneously while the strip is in motion characterized in that the simultaneous polishing operations are effected in offset regions on opposite sides of the strip without reversing the strip face for face, and in that each of said different portions of the strip is supported on the side opposite directly against the pressure exerted during the polishing operation.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a. plurality of pairs of rollers adapted to drive the strip through the apparatus in a horizontal plane, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, a group of tools operating with rouge and water on the upper surface of the strip and non-polishing means engaging the lower surface below the said group of tools and adapted to support the strip against the pressure exerted by them, and a second group of tools simultaneously operating with rouge and water on the lower surface of the strip and non-polishing means engaging the upper surface above the said second Y group of tools and adapted to support the strip against the pressure exerted by them.
  • Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising means for driving the strip through the apparatus in a horizontal plane, a group of tools operating with rouge and water on the upper surface of the strip and non-polishing means engaging the lower surface of the strip below said group of tools to support the strip against the pressure exerted by said tools, and a second group of tools simultaneously operating with rouge and water on the lower surface of the strip and nonpolishing means engaging the upper surface of the strip above said second group of tools to support the strip against the pressure exerted by said tools.

Description

J. H. GRIFFIN April 16, 1940.
Filqd Feb. 3, 1937 illliil'!" Patented Apr. 16 1940 UNITED STATES PATENT OFFICE METHOD AND APPARATUS FOR. POLISHING TRAVELING FLAT GLASS Application February 3, 1937, Serial No. 123,816 In Great Britain February 5, 1936 12 Claims.
This invention relates to polishing method and apparatus operating to polish both surfaces of traveling flat glass and has for its object a form of polishing apparatus of reduced cost.
In polishing apparatus operating to polish simultaneously both surfaces of a traveling strip of fiat glass, the tools operate in pairs, one of each pair on one surface and one opposite to it on the other surface, so that each serves to support the strip against the pressure exerted by the other. In the case of tools having an iron operating surface employing an abrasive such as sand with a considerable amount of water, hereinafter termed grinding tools, the strip is cooled by the water and by conduction through the iron operative surface, but in the case of -tools employing a polishing medium such as rouge with a felt or other non-metallic operative surface (hereinafter termed polishing tools) with which only little water can be used, the glass becomes heated to such a degree that it is liable to crack. Undue heating can be avoided by reducing the energy supplied to the polishing tools, but this means that the number of tools has to be increased, with consequent increase in the cost of the apparatus.
According to the invention, the polishing tools are in two pluralities, one plurality operating on one side of the strip andtheother on the other side of another portion of the strip, and means are provided opposite each plurality for supporting the strip against the pressure exerted by the tools of-the plurality. The supporting means may be a roller bed or it may be a series of tables, and the tables may slide on or under guides with means for removing a table from the series at the end of each plurality and adding it to the series at the start of the said plurality.
It is found that the energy supplied to each tool can be considerably greater when work is being done on only one side of the strip than when tools operate on both sides opposite to each other. Thereby the number of tools required is considerably less and the cost of the apparatus, after allowing for the cost of the supporting means, is less.
In the accompanying drawing Figure 1 is a side elevation of a portion of a grinding and polishing machine, shown diagrammatically in that the supporting framework and driving gear are omitted Figures 2 and 2a are similar views of an alternative constructional form of the in ention, FigureZa being a continuation of Figure 2;
Figure 3 is an end view of Figure 2 from the left, parts being omitted; and
Figure 4 is a section taken on the line 44 of Fig. 2.
Referring to Figure 1, the continuous strip of 6 glass I passes through a plurality of pairs of grinding tools, the two tools of each pair operating on the 'upper and under sides of the strip respectively, so that each serves to support the strip against the pressure exercised by the 10 other; the last pair of grinding tools of the machine is shown at 2. The strip is driven through the machine by pairs of driving rollers 3. The direction of travel of the strip is from left to right. To the right of the last pair of grinding tools 2, where the strip is shown broken away,
a suitable length is left free for washing the strip free of sand. The strip I then passes under .a roller bed 4, which serves as support against the pressure of the polishing tools 5 operating on the underside of the strip. The strip then passes over a roller bed 6, which forms a support against the pressure of the polishing tools I operating on the upper side of the strip. Three polishing tools 5 and three polishing tools I are shown in the drawing, but in practice from twelve to fifteen tools are required to operate on each side of the strip. The whole number of tools required to operate on one side of the strip may be in one group, followed by a group of those required to operate on the other side, or the two kinds of tools may be in smaller groups, alternating one with the other. The rollers I and 6 may be idle rollers or they may be driven at the speed of travel of the strip. Alternatively, a driven belt may be employed as direct support for the strip, the belt passing between the strip and the roller beds 4 and 6. The pairs of driving rollers 3 are then not employed in the polishing section of the machine. 4
Referring to Figures 2, 2a and 3, the last pair of grinding tools is not shown, but is to the left of Figure 2. In this form of construction,
a series of tables 8 is employed to support the strip I against the pressure of the polishing tools 5 and I. The tables 8 slide on upper guides 9 in Figure 2 and on lower guides III in Figure 2a. The end view of a table 8 is seen in Figure 3 in a position above the machine, while being transported. The guides 9 engage the table at the surfaces II. Each table is provided with a rack I2, which is engaged by a pinion I3, shown in dotted lines in Figures 2 and 211. By means of the pinion I3, the series of tables is driven along the guides 9. Each table 8, after-it has a second elevator IT. A table 8 is shown in position in the elevator II at the left hand of Figure 2, and the end view thereof is shown in Figure 3. As seen in this figure, the elevators l5 and I! support the table by rollers l8 engaging it at its edges, the rollers l8 being far enough apart to pass over the strip and its supporting rollers l4.
When a table 8 under the guides 9, has reached the position shown at the left of Figure 2, the elevator I1 is operated to lower another table 8 on to the strip. The table then resting on the strip is pushed into contact with the preceding table under the guides by a pusher l9 operated by a pneumatic cylinder or the like 20, and pressure is exerted by the pusher l9 until the rack l2 of the table comes into engagement with the pinion l3. When the table has passed completely under the guides 9, the elevator I1 is raised to the position shown, where it is ready to receive another table from the runway l6.
In Figure 2a, showing the arrangement where the polishing tools I operate on the upper side of the strip, the table transporting devices are similar, though the elevators are of slightly different construction. The elevator 2| receives a table when it is clear of the last polishing tool and delivers it to the runway 22, which transports it to the elevator 23, by which it is raised to the level of the strip. The pusher l9 then brings it into contact with the preceding table on the guides l0.
Alternatively, the tables may be linked together to form an endless chain, the tables being supported by guides or rollers when supporting the stripagainst the pressure of the tools.
Having described my invention, I declare that what I claim and desire to secure by Letters Patent is:
1. Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of eachpair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operatingsimultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and non-polishing means arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
2. Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group-so as thereby to operate on the traveling strip at different portions of its length, and a series of tables arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
3. Apparatus as in claim 2 comprising guides adapted to support the tables and meansfor removing a table from the series of tables at the end of each group of tables and adding it to the V tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a plurality .of moving supports arranged directly opposite each group of tools and adapted to support the strip against the pressure exerted by the tools of the group.
5. Apparatus for polishing a continuousstrip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a bed arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group, the portions of the bed contacting with the strip moving with the strip.
6. Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising means adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of disc tools made of cast iron operating with their flat surfaces in contact with the glass with sand and water, the two tools of each pair operating on the two sides of the ammo-z strip one opposite to the other, two groups of disc tools covered with a non-metallic material operating with their flat surfaces in contact with the glass with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a plurality of moving supports arranged directly opposite each group of tools and adapted to support the strip against the pressure exerted by the tools of the group.
7. Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other and being adapted to conduct away from the glass heat generated during the grinding operation, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating I simultaneously thereon, one group facing in one direction to operate on the obverse side of the strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools I of one group being. offset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and non-polishing means arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
8. Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising a plurality of pairs of rollers adapted to drive the strip through the apparatus without reversing the strip face for face, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, two groups of tools operating with rouge and water, arranged respectively on opposite sides of the traveling strip and operating simultaneously thereon, one group facing in one direction to operate on the obverse side of the'strip and the other group facing in the opposite direction to operate on the reverse side of said strip, the tools of one group being oilset with reference to the tools of the other group so as thereby to operate on the traveling strip at different portions of its length, and a roller bed arranged directly opposite each group and adapted to support the strip against the pressure exerted by the tools of the group.
9. A method of polishing a continuous strip of glass on both sides simultaneously while the strip is in motion, characterized in that the simultaneous polishing operations are effected in offset regions on opposite sides of the strip without' reversing the strip face for face.
10. A method of polishing a continuous strip of glass on both sides simultaneously while the strip is in motion, characterized in that the simultaneous polishing operations are effected in offset regions on opposite sides of the strip without reversing the strip face for face, and in that each of said different portions of the strip is supported on the side opposite directly against the pressure exerted during the polishing operation.
11. Apparatus for polishing a continuous strip of glass on both sides simultaneously, comprising a. plurality of pairs of rollers adapted to drive the strip through the apparatus in a horizontal plane, a plurality of pairs of tools operating with sand and water, the two tools of each pair operating on the two sides of the strip one opposite to the other, a group of tools operating with rouge and water on the upper surface of the strip and non-polishing means engaging the lower surface below the said group of tools and adapted to support the strip against the pressure exerted by them, and a second group of tools simultaneously operating with rouge and water on the lower surface of the strip and non-polishing means engaging the upper surface above the said second Y group of tools and adapted to support the strip against the pressure exerted by them.
12-. Apparatus for polishing a continuous strip of glass on both sides simultaneously comprising means for driving the strip through the apparatus in a horizontal plane, a group of tools operating with rouge and water on the upper surface of the strip and non-polishing means engaging the lower surface of the strip below said group of tools to support the strip against the pressure exerted by said tools, and a second group of tools simultaneously operating with rouge and water on the lower surface of the strip and nonpolishing means engaging the upper surface of the strip above said second group of tools to support the strip against the pressure exerted by said tools.
JAMES HARRIS GRIFFIN.
US123816A 1936-02-05 1937-02-03 Method and apparatus for polishing traveling flat glass Expired - Lifetime US2197104A (en)

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GB817377X 1936-02-05
GB2197104X 1936-02-05
GB3468/36A GB469951A (en) 1936-02-05 1936-02-05 Improvements in and relating to apparatus for polishing travelling flat glass

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508276A (en) * 1947-04-02 1950-05-16 Pilkington Brothers Ltd Method and apparatus for polishing glass
US20110003539A1 (en) * 2007-12-04 2011-01-06 Flex Trim A/S Apparatus for double-sided grinding
EP3281742A4 (en) * 2015-04-08 2018-12-19 Guangdong Eding Industrial Co., Ltd. Polishing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508276A (en) * 1947-04-02 1950-05-16 Pilkington Brothers Ltd Method and apparatus for polishing glass
US20110003539A1 (en) * 2007-12-04 2011-01-06 Flex Trim A/S Apparatus for double-sided grinding
EP3281742A4 (en) * 2015-04-08 2018-12-19 Guangdong Eding Industrial Co., Ltd. Polishing method

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