US3871857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for press bending glass sheets
Assignee: PPG Industries Inc
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Filing: 1974-02-19
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Granted: 1975-03-18
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Expires: 1994-02-19
Abstract
Abstract A press bending mold having a flexible metal shaping member such as a plate or a frame, a reinforcing grate and adjustable attachment means extending through certain apertures in the reinforcing grate to adjust the shape of the metal shaping member.
Inventors
- 👤 George R Claassen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:33
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/03; C03B23/031
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
234 words
In apparatus for press bending a heat-softened glass sheet by pressurized engagement thereagainst comprising: 1. a metal plate deformable in the direction of its thickness and having a shaping surface whose shape approximates that of the shape desired for the glass sheet after bending and having sufficient rigidity to resist deformation during pressurized engagement against a heat-softened glass sheet, 2. a relatively rigid member more rigid than said metal plate located in spaced relation behind and in facing relation to said metal plate, and 3. adjustable attachment means distributed in spaced relation throughout the area of said metal plate and said relatively rigid member by which the shape of said metal plate may be altered, the improvement wherein said relatively rigid member comprises a metal grate with a plurality of elongated openings therein, said adjustable attachment means are attached to the rear surface of said metal plate and each have a portion that extends thrOugh a selected one of said elongated openings of said grate, said portions being of a dimension to permit lateral and longitudinal movement of said attachment means within said selected one of said openings, and means disposed on each side of said grate to engage therewith and with each said adjustable attaching means to adjust the position of said adjustable attaching means along said elongated openings and lengthwise relative to said grate to alter the shape of said metal plate.
Claim 2
Dependent Claim
234 words
In apparatus for press bending a heat-softened glass sheet by pressurized engagement thereagainst comprising: 1. a metal plate deformable in the direction of its thickness and having a shaping surface whose shape approximates that of the shape desired for the glass sheet after bending and having sufficient rigidity to resist deformation during pressurized engagement against a heat-softened glass sheet, 2. a relatively rigid member more rigid than said metal plate located in spaced relation behind and in facing relation to said metal plate, and 3. adjustable attachment means distributed in spaced relation throughout the area of said metal plate and said relatively rigid member by which the shape of said metal plate may be altered, the improvement wherein said relatively rigid member comprises a metal grate with a plurality of elongated openings therein, said adjustable attachment means are attached to the rear surface of said metal plate and each have a portion that extends thrOugh a selected one of said elongated openings of said grate, said portions being of a dimension to permit lateral and longitudinal movement of said attachment means within said selected one of said openings, and means disposed on each side of said grate to engage therewith and with each said adjustable attaching means to adjust the position of said adjustable attaching means along said elongated openings and lengthwise relative to said grate to alter the shape of said metal plate.
Claim 3
Dependent Claim
24 words
a relatively rigid member more rigid than said metal plate located in spaced relation behind and in facing relation to said metal plate, and
Claim 4
Dependent Claim
24 words
a relatively rigid member more rigid than said metal plate located in spaced relation behind and in facing relation to said metal plate, and
Claim 5
Dependent Claim
49 words
The improvement as in claim 1, wherein said adjustable attachment means comprises threaded shafts each extending through an opening in said grate and said means engageable with said adjustable attachment means comprises a pair of adjustment nuts threadedly engaging said shaft and located on opposite sides of said grate.
Claim 6
Dependent Claim
149 words
adjustable attachment means distributed in spaced relation throughout the area of said metal plate and said relatively rigid member by which the shape of said metal plate may be altered, the improvement wherein said relatively rigid member comprises a metal grate with a plurality of elongated openings therein, said adjustable attachment means are attached to the rear surface of said metal plate and each have a portion that extends thrOugh a selected one of said elongated openings of said grate, said portions being of a dimension to permit lateral and longitudinal movement of said attachment means within said selected one of said openings, and means disposed on each side of said grate to engage therewith and with each said adjustable attaching means to adjust the position of said adjustable attaching means along said elongated openings and lengthwise relative to said grate to alter the shape of said metal plate.
Claim 7
Dependent Claim
149 words
adjustable attachment means distributed in spaced relation throughout the area of said metal plate and said relatively rigid member by which the shape of said metal plate may be altered, the improvement wherein said relatively rigid member comprises a metal grate with a plurality of elongated openings therein, said adjustable attachment means are attached to the rear surface of said metal plate and each have a portion that extends thrOugh a selected one of said elongated openings of said grate, said portions being of a dimension to permit lateral and longitudinal movement of said attachment means within said selected one of said openings, and means disposed on each side of said grate to engage therewith and with each said adjustable attaching means to adjust the position of said adjustable attaching means along said elongated openings and lengthwise relative to said grate to alter the shape of said metal plate.
Claim 8
Dependent Claim
67 words
The improvement as in claim 1, further includes a plunger for actuating said apparatus between a retracted position and a glass engaging position, a rigid mounting plate attached to said plunger, means to attach said rigid mounting plate to said grate in spaced relation behind said grate, said last named space providing access for adjusting said attaching means for connecting said rigid mounting plate and said grate.
Claim 9
Dependent Claim
18 words
The improvement as in claim 1, wherein said deformable metal plate is in the form of a frame.
Claim 10
Dependent Claim
19 words
The improvement as in claim 1, wherein said deformable metal plate is in the form of a solid plate.
Claim 11
Dependent Claim
36 words
The improvement as in claim 1, wherein said grate has an open area sufficient to provide less mass per unit area than that of a solid plate having half the thickness of that of said grate.
References Cited (Backward Citations)
US3367764A
Cited
US3531276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |