Patent US3742793A successfully refreshed from Google Patents.
US3742793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for scoring sheet material
Assignee: Pilkington Group Ltd
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Filing: 1971-07-02
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Granted: 1973-07-03
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Expires: 1991-07-02
Abstract
Abstract A cutter assembly for scoring a score line in a surface of sheet material, is connected to the piston of a double-acting pneumatic cylinder and piston operable to urge the cutter assembly towards the surface to be scored.
Inventors
- 👤 J Gray
- 👤 J Pionke
- 👤 E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:48
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/10; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0348; Y10T83/263; Y10T83/869; Y10T83/8821; Y10T83/8858; Y10T83/8864
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
Apparatus for scoring a score line in a surface of glass sheet material, comprising a cutter assembly and a double acting pneumatic cylinder and piston, the cutter assembly being connected to the piston whereby the piston is operable to urge the cutter assembly towards the surface to be scored, said cylinder and piston comprising a housing defining the cylinder in which the piston is slidable, said housing having an apertured end wall, and a shaft connected with the piston and extending axially of the cylinder through said passageway in the wall of the housing so as to project therefrom, the cutter assembly being connected to the projecting end of the shaft, and the piston being under-size relative to the cylinder and the shaft undersize relative to the passageway thereby permitting flow of air between the piston and the cylinder wall and between the shaft and the passageway wall, whereby two spaced air bearings are provided facilitating controlled movement of the cutter assembly.
Claim 2
Dependent Claim
162 words
Apparatus for scoring a score line in a surface of glass sheet material, comprising a cutter assembly and a double acting pneumatic cylinder and piston, the cutter assembly being connected to the piston whereby the piston is operable to urge the cutter assembly towards the surface to be scored, said cylinder and piston comprising a housing defining the cylinder in which the piston is slidable, said housing having an apertured end wall, and a shaft connected with the piston and extending axially of the cylinder through said passageway in the wall of the housing so as to project therefrom, the cutter assembly being connected to the projecting end of the shaft, and the piston being under-size relative to the cylinder and the shaft undersize relative to the passageway thereby permitting flow of air between the piston and the cylinder wall and between the shaft and the passageway wall, whereby two spaced air bearings are provided facilitating controlled movement of the cutter assembly.
Claim 3
Dependent Claim
50 words
Apparatus according to claim 1, wherein the cutter assembly is mounted on a foot connected to the piston, said Foot having wheels disposed on either side of the cutting tool of the cutter assembly for engagement with the edges of said surface immediately preceding and subsequent to the scoring operation.
Claim 4
Dependent Claim
44 words
Apparatus according to claim 2, wherein the foot has a lead-in surface disposed on the other side of one of the wheels from the cutting tool, the leading edge of a surface to be scored engaging said lead-in surface before engaging said one wheel.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 1, wherein flow-assisting shoulders are provided at the end of the passageway adjacent the cylinder.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 1, including means to maintain the alignment of the cutter assembly.
Claim 7
Dependent Claim
19 words
Apparatus according to claim 1, including a mist lubricator whereby oil-laden air may be supplied to the cutter assembly.
Claim 8
Dependent Claim
48 words
Apparatus according to claim 1, for scoring at least two score lines in a surface of sheet material, including a corresponding number of cutter assemblies and respective independently operable double-acting pneumatic cylinders and pistons mounted on a support bar whereby the spacing between the cutter assemblies is variable.
Claim 9
Dependent Claim
31 words
Apparatus according to claim 1, adapted to be mounted above a conveyor, the cutter assembly being adapted to longitudinally score the upper face of a sheet material passed along said conveyor.
Claim 10
Dependent Claim
24 words
Apparatus according to claim 8, wherein the conveyor is a roller conveyor, the cutter assembly being mounted above a transverse roller of the conveyor.
Claim 11
Dependent Claim
51 words
Apparatus according to claim 1, including means for moving the cutter assembly at an angle across moving sheet material, in a forwardly direction, the angle and speed of the cutter assembly being related to the speed of the sheet material whereby the upper face of the sheet material is scored transversely.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |