US3889862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting glass and plastic sheet
Assignee: Fletcher Terry Co LLC
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Filing: 1974-08-22
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Granted: 1975-06-17
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Expires: 1994-08-22
Abstract
Abstract A wall mounted sheet supporting structure includes a horizontal squaring bar, and a near vertical elongated anvil, both the bar and the anvil being joined together by a gusset plate, and the resulting structure being readily attached to a wall by means of a web shaped bracket behind the anvil, and a smaller Z-shaped bracket spaced from the anvil along the squaring bar. Two guide rods are mounted parallel to but spaced in front of the elongated anvil, and a manually movable cross-head is slidably mounted on these rods. A scoring device is provided in the head for scoring the sheet along a line over the anvil. The scoring device is resiliently mounted in the head on a rocker arm assembly which includes a cutting knife for scoring plastic, and a glass cutting wheel for scoring glass. The cutting force can be varied within two discrete ranges, a much larger force being available for cutting plastic than that provided for cutting glass.
Inventors
- 👤 Thomas A Insolio
- 👤 Vincent T Kozyrski
- 👤 Edward J Witkoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:49
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/007; B28; B28D; B28D1/00; B28D1/22; B28D1/225; C; C03; C03B; C03B33/00; C03B33/02; C03B33/0207; C03B33/023; C03B33/027; C03B33/033; C03B33/10; C03B33/12; B29C37/00; B29C37/0053; B29C37/0057; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/307; Y10T225/321; Y10T225/325; Y10T83/00; Y10T83/02; Y10T83/0333; Y10T83/0348; Y10T83/869; Y10T83/8727; Y10T83/8748; Y10T83/8749; Y10T83/8776; Y10T83/8821; Y10T83/8822
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
268 words
Apparatus for scoring fracture sensitive sheet material comprising: a. support means for the sheet including a horizontally extending squaring bar adapted to engage a lower edge of the sheet to be scored, b. said sheet support means further including an elongated anvil which is inclined slightly to the vertical and which cooperates with said squaring bar to support a planar sheet in a plane slightly inclined with respect to the vertical, c. two parallel guide rails supported in spaced parallel relation to said anvil and extending from a position below said squaring bar gently upwardly and parallel said anvil, d. a cross head slidably mounted on said guide rails and having a handle for manually moving the head along said rails, e. a rocker arm pivotally mounted in said cross head intermediate its ends, f. scoring means adjacent one end of said rocker arm, said scoring means being received in an opening in said arm and means being provided to retain said scoring means in said rocker arm opening, g. biasing means for urging said one end of said rocker arm and said scoring means toward said anvil, h. stop means associated with the other end of said rocker arm to limit the movement of said scoring means toward said anvil, and i. a lever adjacent said handle and pivotally movable in said head generally toward said handle in response to a manual squeezing action, said lever including a projecting portion engageable with said arm to permit moving said scoring means away from said anvil when manually moving said head in a return direction opposite a scoring direction.
Claim 2
Dependent Claim
268 words
Apparatus for scoring fracture sensitive sheet material comprising: a. support means for the sheet including a horizontally extending squaring bar adapted to engage a lower edge of the sheet to be scored, b. said sheet support means further including an elongated anvil which is inclined slightly to the vertical and which cooperates with said squaring bar to support a planar sheet in a plane slightly inclined with respect to the vertical, c. two parallel guide rails supported in spaced parallel relation to said anvil and extending from a position below said squaring bar gently upwardly and parallel said anvil, d. a cross head slidably mounted on said guide rails and having a handle for manually moving the head along said rails, e. a rocker arm pivotally mounted in said cross head intermediate its ends, f. scoring means adjacent one end of said rocker arm, said scoring means being received in an opening in said arm and means being provided to retain said scoring means in said rocker arm opening, g. biasing means for urging said one end of said rocker arm and said scoring means toward said anvil, h. stop means associated with the other end of said rocker arm to limit the movement of said scoring means toward said anvil, and i. a lever adjacent said handle and pivotally movable in said head generally toward said handle in response to a manual squeezing action, said lever including a projecting portion engageable with said arm to permit moving said scoring means away from said anvil when manually moving said head in a return direction opposite a scoring direction.
Claim 3
Dependent Claim
80 words
The apparatus of claim 1 wherein said sheet scoring means comprises a pillar post having a cross sectional shape corresponding to that of said rocker arm opening, said pillar post have a side opening defined intermediate its ends, and said means for retaining said pillar post in said opening comprising a screw threadably received in said one end of said rocker arm, and said retaining screw having an inner end adapted to be received in said pillar post side opening.
Claim 4
Dependent Claim
52 words
The apparatus of claim 2 wherein said pillar post has a glass scoring wheel rotatably mounted in one end and a fracture sensitive plastic scoring knife mounted in its other end, said pillar post being mountable in either one of two positions depending upon whether glass or plastic is to be scored.
Claim 5
Dependent Claim
92 words
The apparatus of claim 1 wherein said biasing means comprises at least two compression springs one end of each spring acts against said rocker arm, one of said springs being stiffer than the other, and means in said cross head for selectively varying the displacement of said stiffer spring to selectively render said stiffer spring effective or ineffective, said other spring always acting between said cross head and said rocker arm and said stiffer spring selectively acting between said rocker arm and said cross arm through said means in said cross head.
Claim 6
Dependent Claim
92 words
The apparatus of claim 3 wherein said biasing means comprises at least two compression springs one end of each spring acts against said rocker arm, one of said springs being stiffer than the other, and means in said cross head for selectively varying the displacement of said stiffer spring to selectively render said stiffer spring effective or ineffective, said other spring always acting between said cross head and said rocker arm and said stiffer spring selectively acting between said rocker arm and said cross arm through said means in said cross head.
Claim 7
Dependent Claim
82 words
The apparatus of claim 4 wherein said means in said cross head for varying said spring force comprises an internally threaded stem slidably received in an opening defined in said cross head, said stiffer spring engaging an annular flange on said sleeve, and a projecting bayonet on said sleeve engageable with one end of a bayonet slot defined in said cross head, and a spRing force adjusting screw threadably received in said sleeve and having its inner end engaging said other spring.
Claim 8
Dependent Claim
82 words
The apparatus fo claim 5 wherein said means in said cross head for varying said spring force comprises an internally threaded stem slidably received in an opening defined in said cross head, said stiffer spring engaging an annular flange on said sleeve, and a projecting bayonet on said sleeve engageable with one end of a bayonet slit defined in said cross head, and a spring force adjusting screw threadably received in said sleeve and having its inner end engaging said other spring.
Claim 9
Dependent Claim
61 words
The apparatus of claim 1 further including means for fracturing the scored sheet, said anvil having a cross sectional shape defined by sloping sides which intersect to define an apex at the line of score, and said sheet fracturing means comprising a device with spaced lands for engaging the sheet at laterally spaced locations on either side of said score line.
Claim 10
Dependent Claim
87 words
The apparatus of claim 8 wherein said sheet fracturing device comprises a generally L-shaped tool one end of which is adapted for insertion between said guide rails and the scored sheet and having said spaced lands defined thereon, the other end of said L-shaped tool serving as a manual handle to permit the user to operate the tool in a lever-like action at successive locations along said anvil to develop a fissure at said score line in order to facilitate the final fracturing of a plastic sheet.
Claim 11
Dependent Claim
79 words
The apparatus of claim 8 wherein said sheet fracturing device comprises a crank arm which is pivotally mounted to one of said guide rails and which has a handle portion for moving said crank arm from an inactive position toward an active position, biasing means for urging said crank arm toward said inactive position, and said spaced lands being defined on a free end portion of said crank arm located between said guide rails for so engaging said sheet.
Claim 12
Dependent Claim
65 words
The apparatus of claim 1 wherein said cross head includes three slide bearings, one slidably received on one of said two guide rails, and the other two bearings being slidably received on the other of said two guide rails, and said handle being integrally defined by a casting in which said slide bearings are mounted, said handle being located between said guide rail receiving bearings.
Claim 13
Dependent Claim
66 words
The apparatus of claim 11 wherein said casting defining said cross head also defines a raised boss in which said biasing means is provided, said biasing means comprising two coaxially arranged coil compression springs, one of said springs being stiffer than the other, and means in said cross head boss for selectively varying the displacement of said stiffer spring to render it either effective or ineffective.
Claim 14
Dependent Claim
88 words
The apparatus of claim 12 wherein said means in said cross head boss for varying said biasing force of said coaxially arranged springs comprises an internally threaded stem slidably received in an opening defined in said cross head, said stiffer spring engaging an annular flange on said sleeve, and a projecting bayonet on said sleeve engageable with one end of a bayonet slot defined in said cross head, and a spring force adjusting screw threadably received in said sleeve and having its inner end engaging said other spring.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |