US3793983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for marking flat glass
Assignee: PPG Industries Inc
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Filing: 1972-04-20
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Granted: 1974-02-26
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Expires: 1992-04-20
Abstract
Abstract Disclosed herein are apparatus and methods for marking the location of defects in a moving ribbon or sheets of flat glass and, in particular, apparatus which comprises a marking material holder and transfer wheel assembly which is suitably supported above said ribbon or sheets of glass and arranged to be rapidly actuated into and out of contact with the glass to mark the location of defects therein.
Inventors
- 👤 J Shelestak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:55
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/38; G01N33/386
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
An apparatus for marking a surface of a piece of flat glass, comprising: a holder for a piece of marking material; a marking wheel; means for rotatably supporting said marking wheel such that the perimeter of said marking wheel is in contact with the marking material; means for biasing the marking material toward the perimeter of said wheel to urge the marking material against the perimeter of the wheel while preventing crushing of the marking material; and means for moving said holder and marking wheel toward and away from the surface of the piece of flat glass to move said marking wheel into and out of contact, respectively, with the surface of the flat glass wherein said wheel rotates relative to the marking material to transfer the marking material on the perimeter of said wheel to the surface when said wheel is in contact with the surface.
Claim 2
Independent Claim
147 words
An apparatus for marking a surface of a piece of flat glass, comprising: a holder for a piece of marking material; a marking wheel; means for rotatably supporting said marking wheel such that the perimeter of said marking wheel is in contact with the marking material; means for biasing the marking material toward the perimeter of said wheel to urge the marking material against the perimeter of the wheel while preventing crushing of the marking material; and means for moving said holder and marking wheel toward and away from the surface of the piece of flat glass to move said marking wheel into and out of contact, respectively, with the surface of the flat glass wherein said wheel rotates relative to the marking material to transfer the marking material on the perimeter of said wheel to the surface when said wheel is in contact with the surface.
Claim 3
Dependent Claim
36 words
The apparatus according to claim 1 wherein the perimeter of said marking wheel is comprised of a material that readily accepts the marking material and readily transfers the marking material to the surface of the glass.
Claim 4
Dependent Claim
18 words
The apparatus according to claim 2 wherein the perimeter of said marking wheel comprises a grit-containing flexible material.
Claim 5
Dependent Claim
12 words
The apparatus according to claim 3 wherein the grit comprises silicon carbide.
Claim 6
Dependent Claim
74 words
The apparatus according to claim 1 wherein said holder comprises an elongated body member having a web and a pair of laterally spaced flanges defining an elongated, open slot therebetween to receive the marking material, an elongated cover member affixed to said flanges to enclose the slot and said means for rotatably supporting said wheel mounted between said flanges to support said marking wheel in alignment with and adjacent one end of the slot.
Claim 7
Dependent Claim
99 words
The apparatus according to claim 5 wherein said means for biasing the marking material includes an elongated rod constructed and arranged to be inserted into the slot from the end opposite said marking wheel to urge the marking wheel toward said wheel and a resilient material affixed to the rod end nearest said marking wheel and slideably engaging sides of the slot to prevent movement of said rod during movement of said holder and said wheel toward and away from the surface of the piece of glass to prevent crushing and jamming of the marking material in the slot.
Claim 8
Dependent Claim
61 words
The apparatus according to claim 5 wherein said moving means includes: a support means; a slide member connected to said support means; and a slideway member attached to said holder wherein said slide member and said slideway member are cooperatively interengaged so that said holder is vertically reciprocable in a plane perpendicular to the surface of the piece of flat glass.
Claim 9
Dependent Claim
66 words
The apparatus according to claim 7 wherein said moving means further includes: a spring operatively connected to said holder and said support means to bias said marking wheel out of contact with the surface of the flat glass; and an electrically actuated solenoid operatively connected to said holder and said support means to move said marking wheel into contact with the surface of the flat glass.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |