Patent US3756482A successfully refreshed from Google Patents.
US3756482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing trim from patterns
Assignee: PPG Industries Inc
•
Filing: 1972-04-28
•
Granted: 1973-09-04
•
Expires: 1992-04-28
Abstract
Abstract A pattern is scored in a major surface of a piece of flat glass, and the score is propagated into a fracture that extends at least almost entirely to an opposite major surface of the piece. Heat is applied at a location adjacent to an edge of the piece until a red glow is visible at the glass surface. At that time, an edge nick is applied to the glass adjacent to the red glow to complete a vent from the edge nick to the fracture defining the pattern. This is repeated several times to free the pattern from its trim without damaging the edge of the pattern.
Inventors
- 👤 R Torre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:12
CPC Classifications
C; C03; C03B; C03B33/00; C03B33/09; C03B33/02; C03B33/04; Y; Y10; Y10T; Y10T225/00; Y10T225/10; Y10T225/12; Y10T225/30; Y10T225/304
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
80 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. producing a fracture in the form of the pattern in the piece of flat glass, b. creating a first vent from an edge of said piece to said fracture by heating an area of said trim and applying a mechanical defect to said edge adjacent to said area, and c. creating additional vents to separate the trim from the pattern.
Claim 2
Independent Claim
80 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. producing a fracture in the form of the pattern in the piece of flat glass, b. creating a first vent from an edge of said piece to said fracture by heating an area of said trim and applying a mechanical defect to said edge adjacent to said area, and c. creating additional vents to separate the trim from the pattern.
Claim 3
Dependent Claim
62 words
A method as set forth in claim 1, further characterized in that said first vent is created by: a. heating said trim on a major surface thereof to create a hot spot, and b. applying said mechanical defect to said edge of said piece adjacent to said hot spot to complete said vent from said edge of said piece to said fracture.
Claim 4
Dependent Claim
18 words
A method as set forth in claim 2, further characterized in that said defect is an edge nick.
Claim 5
Dependent Claim
23 words
A method as set forth in claim 3, further characterized in that said trim is heated within approximately 25 millimeters of the edge.
Claim 6
Dependent Claim
61 words
A method as set forth in claim 2, further characterized in that said additional vents are each created by heating said trim on a major surface thereof to create a hot spot and applying a mechanical defect to an edge of said piece adjacent to said hot spot to complete said vent from the edge of said piece to the fracture.
Claim 7
Dependent Claim
56 words
A method as set forth in claim 2, further characterized in that said additional vents are each created by applying a mechanical defect to said edge of said piece, and heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture.
Claim 8
Dependent Claim
20 words
A method as set forth in claim 2, further characterized in that said vents are created one at a time.
Claim 9
Dependent Claim
21 words
A method as set forth in claim 7, further characterized in that said pattern is in the form of a circle.
Claim 10
Dependent Claim
24 words
A method as set forth in claim 7, further characterized in that a plurality of patterns are removed from a single piece of glass.
Claim 11
Dependent Claim
20 words
A method as set forth in claim 9, further including the step of: a. creating additional vents between the patterns.
Claim 12
Dependent Claim
44 words
A method as set forth in claim 10, further characterized in that said additional vents are created by: a. applying nicks in one of the major surfaces of the piece between the patterns, and b. heating said nicks to creaTe vents between the patterns.
Claim 13
Dependent Claim
56 words
A method as set forth in claim 11, further characterized in that said fracture is produced by the steps of: a. scoring a major surface of the piece in the form of the pattern, and b. propagating said score into a fracture that extends at least almost entirely to an opposite major surface of said piece.
Claim 14
Dependent Claim
57 words
A method as set forth in claim 1, further characterized in that said first vent is created by: a. applying said mechanical defect to said edge of said piece, and b. heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture.
Claim 15
Dependent Claim
18 words
A method as set forth in claim 13, further characterized in that said defect is an edge nick.
Claim 16
Dependent Claim
23 words
A method as set forth in claim 14, further characterized in that said trim is heated within approximately 25 millimeters of the edge.
Claim 17
Dependent Claim
61 words
A method as set forth in claim 13, further characterized in that said additional vents are each created by heating said trim on a major surface thereof to create a hot spot and applying a mechanical defect to an edge of said piece adjacent to said hot spot to complete said vent from the edge of said piece to the fracture.
Claim 18
Dependent Claim
56 words
A method as set forth in claim 13, further characterized in that said additional vents are each created by applying a mechanical defect to said edge of said piece, and heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture.
Claim 19
Dependent Claim
20 words
A method as set forth in claim 13, further characterized in that said vents are created one at a time.
Claim 20
Dependent Claim
21 words
A method as set forth in claim 18, further characterized in that said pattern is in the form of a circle.
Claim 21
Dependent Claim
24 words
A method as set forth in claim 18, further characterized in that a plurality of patterns are removed from a single piece of glass.
Claim 22
Dependent Claim
20 words
A method as set forth in claim 20, further including the step of: a. creating additional vents between the patterns.
Claim 23
Dependent Claim
44 words
A method as set forth in claim 21, further characterized in that said additional vents are created by: a. applying nicks in one of the major surfaces of the piece between the patterns, and b. heating said nicks to create vents between the patterns.
Claim 24
Dependent Claim
56 words
A method as set forth in claim 22, further characterized in that said fracture is produced by the steps of: a. scoring a major surface of the piece in the form of the pattern, and b. propagating said score into a fracture that extends at least almost entirely to an opposite major surface of said piece.
Claim 25
Independent Claim
158 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. tapping said score from below to start a fracture, c. applying heat along said score from above to propagate said score into a fracture that extends at least almost entirely to an opposite major surface of said piece, d. applying heat along said score from below, e. applying spot heat to a major surface of said trim adjacent to an edge of said piece until a red glow appears, f. applying a mechanical defect to said edge of said piece adjacent to said red glow to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 26
Independent Claim
158 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. tapping said score from below to start a fracture, c. applying heat along said score from above to propagate said score into a fracture that extends at least almost entirely to an opposite major surface of said piece, d. applying heat along said score from below, e. applying spot heat to a major surface of said trim adjacent to an edge of said piece until a red glow appears, f. applying a mechanical defect to said edge of said piece adjacent to said red glow to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 27
Independent Claim
144 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. tapping said score from below to start a fracture, c. applying heat along said score from above to propagate said score into a fracture that extends at least almost entirely to an opposite major surface of said piece, d. applying heat along said score from below, e. applying a mechanicaL defect to said edge of said piece, f. heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 28
Independent Claim
144 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. tapping said score from below to start a fracture, c. applying heat along said score from above to propagate said score into a fracture that extends at least almost entirely to an opposite major surface of said piece, d. applying heat along said score from below, e. applying a mechanicaL defect to said edge of said piece, f. heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 29
Independent Claim
159 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. applying a top center tap at the approximate center of curvature of said pattern to propagate the score into a fracture, c. applying heat along the fracture from above to further propagate the fracture, d. applying heat from below along the fracture to further propagate the fracture, e. applying spot heat to a major surface of said trim adjacent to an edge of said piece until a red glow appears, f. applying a mechanical defect to said edge of said piece adjacent to said red glow to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 30
Independent Claim
159 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. applying a top center tap at the approximate center of curvature of said pattern to propagate the score into a fracture, c. applying heat along the fracture from above to further propagate the fracture, d. applying heat from below along the fracture to further propagate the fracture, e. applying spot heat to a major surface of said trim adjacent to an edge of said piece until a red glow appears, f. applying a mechanical defect to said edge of said piece adjacent to said red glow to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 31
Independent Claim
145 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. applying a top center tap at the approximate center of curvature of said pattern to propagate the score into a fracture, c. applying heat along the fracture from above to further propagate the fracture, d. applying heat from below along the fracture to further propagate the fracture, e. applying a mechanical defect to said edge of said piece, f. heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
Claim 32
Independent Claim
145 words
A method of severing a trim from a pattern in a piece of flat glass comprising the steps of: a. scoring a major surface of said piece in the form of said pattern, b. applying a top center tap at the approximate center of curvature of said pattern to propagate the score into a fracture, c. applying heat along the fracture from above to further propagate the fracture, d. applying heat from below along the fracture to further propagate the fracture, e. applying a mechanical defect to said edge of said piece, f. heating said trim on a major surface thereof adjacent to said mechanical defect to complete a vent from said edge of said piece to said fracture, g. creating additional vents in said trim until said trim is separated from said pattern, and h. seaming upper and lower portions of the pattern edge.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |