US 3,936,291 AGranted

Glass sheet tempering blasthead

OwnerHarold A. McMasterinventor

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Abstract

A glass tempering blasthead including a pair of plenum chambers with opposed banks of nozzles for directing air or other fluid flow onto opposite surfaces of a sheet of glass disposed therebetween for quenching or cooling the glass subsequent to heat treatment of the glass. Each plenum chamber has a fluid flow distributing assembly including a pair of complementary sheet members. Each of the sheet members is stamped so that when secured in complementary relationship with the other sheet member a series of nozzles are formed having flared inlets communicating with a transverse feed passage for directing flow from the plenum chamber into the flared inlets of the nozzles. When the glass sheets are disposed horizontally between the opposed nozzles, the nozzles have their axes disposed parallel to the vertical. When the glass sheets are disposed vertically between the opposed nozzles, the nozzles are inclined downwardly to drive the heat and spent air downwardly off the bottom of the glass sheet and to better maintain a pressure balance on the opposite surfaces of the glass sheet. Further, the nozzles located adjacent the upper ends of the plenum chambers are inclined downwardly at a greater angle than the remaining nozzles to direct the flow therefrom away from the carrier of the glass sheet to reduce the likelihood of heat distortion of the carrier. The vertically disposed blasthead is supported in such a manner that it reciprocates during a quenching operation to apply uniform cooling temperature to the opposite surfaces of the sheet. In order to prevent contamination of the fluid flow from the nozzles, a dry, rolling seal is provided between the plenum chamber and the supply ducts to the plenum chambers.

Claims18

Dependent claims

A glass tempering blasthead comprising:

a pair of plenum chambers, each of said plenum chambers having fluid flow distributing assemblies providing opposed banks of nozzles for directing cooling fluid onto opposite surfaces of a sheet of glass disposed therebetween, said fluid flow distributing assemblies each including a pair of complementary sheet members, each of said sheet members having a free edge spaced from its respective plenum chamber and being formed with a series of depressions spaced from each other by nozzle portions, each of said nozzle portions and depressions extending inwardly from the free edge of the respective sheet member with a depression between each adjacent pair of nozzle portions, each depression and nozzle portion having an inner end remote from said free edge, the inner end of each depression curving away from said free edge and the inner ends of the adjacent pair of nozzle portions, said sheet members each being formed with a transverse feed passage portion projecting transversely outwardly from the inner ends of said depressions, said pair of complementary sheet members being joined together such that each depression of one sheet member is in complementary abutting relationship with a depression of the other sheet member, and each nozzle portion of one sheet member is in opposed complementary relationship with a nozzle portion of the other sheet member to form a nozzle having an outlet at the juxtaposed free edges of said sheet members and a flared inlet defined by the curved inner ends of the depressions on opposite sides of the nozzle, and said transverse feed passage portions of said sheet members cooperate to define a transverse feed passage projecting from the respective plenum chamber and extending transversely of said nozzles, said transverse feed passage communicating along its length with said plenum chamber and nozzles for transmitting fluid flow from said plenum chamber into the flared inlets of said nozzles each of said plenum chambers having side walls, and further including a plurality of U-shaped components extending across the side walls of the plenum chambers, said U-shaped components having base portions forming the inner faces of the respective plenum chambers and each having a pair of spaced, parallel leg portions projecting from its respective base portions, said leg portions being defined by said sheet members, said components being disposed in side-to-side relationship across the edges of the side walls of the respective plenum chambers such that a leg portion of one component is disposed in complementary relationship with a leg portion of the adjacent components.

A glass tempering blasthead comprising:

a pair of plenum chambers, each of said plenum chambers having fluid flow distributing assemblies providing opposed banks of nozzles for directing cooling fluid onto opposite surfaces of a sheet of glass disposed therebetween;
each of said plenum chambers having peripheral walls;
said fluid flow distributing assemblies each including a plurality of U-shaped sheet metal components, each of said components having a base portion and a pair of spaced, parallel leg portions extending from the edges of said base portion;
the base portions of each of said components extending across the peripheral walls of the respective plenum chamber to form an inner face of said plenum chamber;
each of said leg portions having a free edge spaced from its respective base portion and being formed with a series of depressions spaced from each other by arcuate nozzle portions;
each of said nozzle portions and depressions extending inwardly from said free edge with a depression formed between each adjacent pair of nozzle portions;
each depression and nozzle portion having an inner end remote from said free edge, the inner end of each depression being arcuate and curving away from said free edge as well as the inner ends of the adjacent pair of nozzle portions;
said leg portions each being formed with a transverse feed passage portion projecting transversely outwardly from the inner ends of said depressions and located between the inner ends of said depression and said base portion;
said components being disposed on said plenum chamber such that each leg portion of one component is in opposed, complementary relationship with the leg portion of another component, said complementary leg portions being joined together such that each depression of one complementary leg portion is in abutting relationship with a depression of the other complementary leg portion and each nozzle portion of one complementary leg portion is in opposed, complementary relationship with the nozzle portion of the other complementary leg portion to form a nozzle having an outlet at the juxtaposed free edges of said complementary leg portions and a flared inlet defined by the curved inner end of the abutting depressions on opposite sides of the nozzle;
and said transverse feed passage portions of the complementary leg portions cooperating to define a transverse feed passage projecting from the respective plenum chamber and extending transversely of the nozzles of said complementary leg portions, said feed passage communicating along its length with said plenum chamber and nozzles for transmitting fluid flow from said plenum chamber into the flared inlets of said nozzles.

7 more elements

A glass tempering blasthead comprising:

a pair of plenum chambers having spaced, opposed, vertical inner faces;
a series of nozzles projecting from said inner faces for directing fluid from said plenum chambers onto opposite surfaces of a sheet of glass received between said nozzles;
a supporting frame;
means for reciprocating said plenum chambers with respect to said supporting frame;
each of said plenum chambers having an open inlet end;
a stationary inlet duct received in the inlet end of each plenum chamber;
and dry seal means mounted between the relatively reciprocating surfaces of said inlet ducts and inlet ends of said plenum chambers to prevent leakage therebetween;
and including spring means resiliently supporting said plenum chambers on said frame.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/542,326Filed 20 Jan 1975 · continuation in part
Priority: 14 Aug 1972
Granted: 3 Feb 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

C03B 27/0404
Using gas: nozzles, blow heads, blowing units or their arrangements, specially adapted for flat or bent glass sheets
C03B 27/052
Using gas: for flat or bent glass sheets being in a vertical position
F28C 3/005
Other direct-contact heat-exchange apparatus: one heat-exchange medium being a solid
C03B
Manufacture, shaping, or supplementary processes