US1776574A - Apparatus and process for flattening glass - Google Patents

Apparatus and process for flattening glass Download PDF

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Publication number
US1776574A
US1776574A US130676A US13067626A US1776574A US 1776574 A US1776574 A US 1776574A US 130676 A US130676 A US 130676A US 13067626 A US13067626 A US 13067626A US 1776574 A US1776574 A US 1776574A
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US
United States
Prior art keywords
cylinder
glass
compartment
bar
flattening
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 - Lifetime
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US130676A
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English (en)
Inventor
Arrault Jules
Deschamps Lucien
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.)
Compagnie de Saint Gobain SA
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Compagnie de Saint Gobain SA
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
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Application filed by Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/04—Re-forming tubes or rods
    • C03B23/051—Re-forming tubes or rods by gravity, e.g. sagging

Definitions

  • the tool may also cause movement of the glass on the flattening stone, resulting in stria, particularly on the under surface, which moreover may have its finish impaired by inequality of the stone into which it is forced by the tool, or it may, if too ho-t, stick to the stone.
  • the object of the present invention is to overcome these defects present in flattening glass by the rubbing operation above described, and it involves the flattening of curved glass by tractive effort exerted thereon.
  • Figure 1 is a longitudinal section through ⁇ an apparatus invented by us for carrying out our improved process'.
  • Figures 2, 3 and 4 are transverse sections on lines 17-17, 18-18 and 19-19 respectively of Figure 1.
  • the first compartment 49 may be termed the softening compartment
  • the second compartment 50 is the flattening compartment
  • the third compartment '51 is the intermediate or lock compartment
  • the-fourth compartment 52 is the annealing compartment.
  • the glass cylinders are fed while each cylinder 39 is supported ait its upper portion by a bar 42 extending 'therethrough and projecting beyond each end.
  • Each bar previously heated before entering the compartment 49, has suitable lugs 40 and 41 on its upper s urface on which the cylinder initially rests, and which serve to prevent the contact of the coldglass along a generant line of the cylinder with the heated bar.
  • Each bar 42 forms a part of a flattening assembly.
  • Each of ⁇ these assemblies also comprises a lower bar 47, projectinglongitudinally through the cylinder to beyond the ends thereof, and initially held out of contact with the bottom of the cylinder by a latch 48 at each end, the latches being pivoted to links 43, pendant from the upper bar and engaging a suitable projection on links 44 arising from the lower bar.
  • the links 43 and 44 are also connected together by the toggle arms 45 and446, which in the initial position of the apparatus have the position shown in Figure 5.
  • the links and levers thus constitute an expansible connection between the bars.
  • a cylinder having the described arrangement of the bars 42 and 47 contained within it is fed through the structure, while supported on the upper bar 42, first entering the means of burners 58 assumes under its own weight an ovate cross section, the bar 47 being held up by the latches 48. ⁇ Vhen the cylinder has become sufficiently heated, it is fed into the compartment 50. lVhile in this compartment, and at the position indicated by the section line 18-vl8, the lower bar 47 is lifted by means of' heads 61 on the vertical pistons 60, which may be raised from' the outside for this purpose. The lifting of' the bar 47 disengages the latches 48, so that when the pistons are again allowed to fall, the bar 47 will follow them down until arrested by the bottom of the now ovate glass.
  • the extent to which the lower bar may drop will be limited by the length of the levers 45 when straightened.
  • the glass is now fed from the flatening compartment 50 to the lock compartment 51, and after the door is closed, the door 56 is opened, and the glass is fed into the annealing compartment 52. 1t will be seen that the doors 55 and 56 and the lock compartment prevent the annealing compartment from being in direct communication with the Hattening compartment 50, and hence permit better regulation of the temperature in the annealing compartment.
  • the flattened cylinders are now fed through the annealing compartment and are 'finally removed therefrom.
  • the flattening assembly may be now removed from the glass and the curved end portions thereof cut olf, providing two sheets, the flat- I tening assembly -being returned to the entrance end ot' the heating structure for further use.
  • Any suitable means may be provided for feeding the cylinders and their associated flattening assemblies through the heated structure.
  • the mechanism shown for this purpose comprises two pairs of rodsl and 66, each pair consisting ofl a rod on each side of the heated structure, the pairs being independentlymovable longitudinally of' the heated strncture.
  • the rods 65 are carried by rollers 67 working on tracks 69 located in the heating and flattening compartment, and the rods 66 are carried by rollers 68 workingon tracks 7 0, located in the annealing compartment.
  • a bar 42 of an expanding assembly is placed on the rods 65 adjacent to the entrance door 53, as shown to the left of' Figure 16 and the rods are given a longitudinal lnotion into the heated Structure suliicient to transfer the cylinder to the position indicated by section line 17-l7, the bracket 7l being at this time down. If the bracket is now raised, the bar 42 will be transferredv to the bracket and the rods 65 may be withdrawn to their original poistion. Upon now lowering the bracket the bar 42 will be again transferred to the rods 65, but at a new poistion thereon.
  • aiattening assembly consisting of a plurality of bar s with an extensible connection between them, of sheet separators interposed between the bars, and latches adapted to hold the bars together.
  • a flattening assembly comprising a plurality of bars with an extensible connection between them, of latches adapted to hold the connection in contracted position, and means for releasing the latches.
  • the combination with a heated structure, of a flattening assembly adapted to be inserted in the cylinder and consisting of an upper and a lower bar having anext'ensible connection, means for feeding the assembly with the glass thereon in an out of the structure, means forinitially holding the connection contracted, and means for releasing said holding means when the assembly is in the heated structure.
  • a flattening compartment comprising a flattening compartment, an annealing-compartment, and a compartment intermediate of the -two, the several compartments beingseparated from each other, a flattening assembly adapted to be inserted while contracted in a glass cylinder and together with thefglass to be sent through the structure,
  • the hereinbefore described method of A producing flat glass sheets from a glass cylin- V der which comprises inserting a plurality of barsflongitudinally in the cylinder, the Vone above the other, adjacent to two opposite generant lines of the cylinder, restraining such bars from relative movement while the glass is cold, heating the cylinder and' releasing, when the cylinder is hot, the lower of sai bars for downward movement of a positively limited exten 12.
  • the hereinbefore described method of producing flat glass sheets from a glass cylinder which comprises inserting a plurality-of ⁇ bars longitudinally in the cylinder, the one above the other, adjacentto two opposite generant lines of the cylinder, restraining such bars from relative movement while the glass is cold, heating the cylinder and releasing, when the cylinder is hot, the lower of said bars for downward movement, and limiting the approach of the two sheets thus formed.
  • the hereinbefore described method of producing flat glass sheets from glass cylinders which .comprises inserting a plurality when the cylinder is hot, the lower of bars longitudinally in the cylinder, the one above the otherLsupporting the cylinder on and transporting it by the upper of said bars through zones of softening and.
  • the hereinbefore described method of producing flat glas 'sheets from glass cylinders which comprises inserting a plurality of bars longitudinally in the cylinder, the one above theI other, supporting the cylinder on and transporting it by the upper of said barsfthrough zones of softening and annealing temperatures, restraining the lower bar from downward movement while the cylinder is cold, and releasing it for a positively limited downward movement when the cylinderis hot.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
US130676A 1925-08-27 1926-08-21 Apparatus and process for flattening glass Expired - Lifetime US1776574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1776574X 1925-08-27

Publications (1)

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US1776574A true US1776574A (en) 1930-09-23

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US130676A Expired - Lifetime US1776574A (en) 1925-08-27 1926-08-21 Apparatus and process for flattening glass

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US (1) US1776574A (enrdf_load_stackoverflow)
NL (1) NL20151C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975103A (en) * 1988-09-07 1990-12-04 Schott Glaswerke Process for producing a planar glass substrate coated with a dielectric layer system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975103A (en) * 1988-09-07 1990-12-04 Schott Glaswerke Process for producing a planar glass substrate coated with a dielectric layer system

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Publication number Publication date
NL20151C (enrdf_load_stackoverflow)

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