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US4767439A Expired / Lapsed US ⏱️ 0.0 years remaining

Flow barrier in the annealing section of a glass tempering apparatus

Assignee: Tamglass Oy
•
Filing: 1987-10-28
•
Granted: 1988-08-30
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Expires: 2007-10-28
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Abstract

Abstract The invention relates to a flow barrier in the annealing section of a glass tempering apparatus, said annealing section being provided with glass sheet supporting rollers (7) and cooling air blow boxes (1, 3) are disposed above and below a glass sheet, in addition to which there are, above the glass sheets, "false rolls" (8) in the form of a downward open trough, extending crosswise to the traveling direction of said glass sheets. The purpose of "false rolls" (8) is to increase a pressure applied to the top surface of a glass sheet in order to reduce the risk of a glass sheet becoming afloat. A flow along the trough, which increases towards the ends of the trough, results in a non-uniform tempering. The flow is cut off by fitting the trough with partitions (9) spaced from each other.

Inventors

  • 👤 Pauli Reunamaki

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 23:40
CPC Classifications
C; C03; C03B; C03B27/00; C03B27/04; C03B27/0404; C03B27/044

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 90 words
A flow barrier in the annealing section of a glass tempering apparatus, said annealing section being provided with glass sheet supporting rollers (7) and cooling air blow boxes (1, 3) disposed above and below a glass sheet and, furthermore, above the glass sheets are mounted "false rolls" (8) in the form of a downward open trough, extending crosswise relative to the traveling direction of glass sheets, characterized in that said trough (8) is provided with longitudinally spaced partitions (9) for stopping the flow of cooling air longitudinally of the trough.
Claim 2
Dependent Claim 90 words
A flow barrier in the annealing section of a glass tempering apparatus, said annealing section being provided with glass sheet supporting rollers (7) and cooling air blow boxes (1, 3) disposed above and below a glass sheet and, furthermore, above the glass sheets are mounted "false rolls" (8) in the form of a downward open trough, extending crosswise relative to the traveling direction of glass sheets, characterized in that said trough (8) is provided with longitudinally spaced partitions (9) for stopping the flow of cooling air longitudinally of the trough.
Claim 3
Dependent Claim 27 words
A flow barrier as set forth in claim 1, characterized in that said partitions (9) are formed by means of a separate grate fitted in the trough.
Claim 4
Dependent Claim 27 words
A flow barrier as set forth in claim 1, characterized in that said partitions (9) are fitted in slots (10) made in the edges of the trough.
Claim 5
Dependent Claim 27 words
A flow barrier as set forth in claim 1, characterized in that the distances between partitions (9) are up to 40 cm, most preferably circa 10 cm.
Claim 6
Dependent Claim 25 words
A flow barrier as set forth in claim 2, characterized in that said partitions are fitted in slots made in the edges of the trough.
Claim 7
Dependent Claim 26 words
A flow barrier as set forth in claim 2, characterized in that the distances between partitions are up to 40 cm, most preferably circa 10 cm.
Claim 8
Dependent Claim 26 words
A flow barrier as set forth in claim 3, characterized in that the distances between partitions are up to 40 cm, most preferably circa 10 cm.

References Cited (Backward Citations)

US1841060A Cited
US1955163A Cited
US3223498A Cited
US4236909A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-08-30 1992-02-29 1992-08-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-08-30 1996-02-29 1996-08-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-08-30 2000-02-29 2000-08-30 $7700.00 Window Closed / Lapsed

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