Patent US3975983A successfully refreshed from Google Patents.
US3975983A
Expired / Lapsed
US
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Method for engraving graphical representations upon workable materials
Assignee: Individual
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Filing: 1975-09-23
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Granted: 1976-08-24
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Expires: 1995-09-23
Abstract
Abstract A method for engraving three-dimensional graphic intelligence upon workable stock, utilizing a three-dimensional pantograph engraving machine. A master is prepared wherein analogs of engraved graphics are defined by constant width U-cut channels. The depth of a U-channel is proportional at each point to the width of the corresponding graphic. The master is positioned at the master object receiving bed of the pantograph machine and desired analogs are traced, utilizing as the tracing element a cylindrical stylus having a diameter approximating that of the channels. A work cutting tool moves homologously with the stylus to cut the workable stock. The tool is adapted to sweep a cone during rotation, whereby a graphic is produced having a width at the surface of the work piece, and a depth at each point, which is proportional to the vertical excursion of the tracing element during its pass through the U-channel of the master, thus producing graphics having the attributes of a true hand engraving.
Inventors
- 👤 John H. Stockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
B; B44; B44B; B44B1/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/30112; Y10T409/301176; Y10T409/301232; Y10T409/303416; Y10T409/303472; Y10T409/303696
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
A method for engraving 3-dimensional graphics upon a work piece, comprising: positioning at the master object receiving bed of a 3-dimensional pantograph engraving machine, a master wherein analogs of graphics to be engraved are defined by constant width U-cut channels, the center line of said U-channel defining a pattern geometrically similar to the said graphics to be engraved, and the depth of said U-channels being proportional at each point to the width at the surface of said work piece of a said graphic to be engraved; positioning said work piece at the work piece receiving bed of said machine; traversing the U-cut channels defining desired graphics with a cylindrical stylus having a diameter approximately that of the said U-cut channel, while maintaining the bottom of said stylus in contact with the bottom of said U-cut channels; and simultaneously cutting said work piece with a cutting tool moving in 3-dimensions homologously with said stylus; said tool being adapted to sweep a cone during rotation thereof, whereby a graphic is produced on said work piece having a width at the surface thereof and walls sloping to a depth at each point, which width and depth are proportional to the vertical excursions of the stylus during its pass through the U-cut channels of said master; thereby producing a graphic from said analogs having the attributes of a true engraving.
Claim 2
Independent Claim
226 words
A method for engraving 3-dimensional graphics upon a work piece, comprising: positioning at the master object receiving bed of a 3-dimensional pantograph engraving machine, a master wherein analogs of graphics to be engraved are defined by constant width U-cut channels, the center line of said U-channel defining a pattern geometrically similar to the said graphics to be engraved, and the depth of said U-channels being proportional at each point to the width at the surface of said work piece of a said graphic to be engraved; positioning said work piece at the work piece receiving bed of said machine; traversing the U-cut channels defining desired graphics with a cylindrical stylus having a diameter approximately that of the said U-cut channel, while maintaining the bottom of said stylus in contact with the bottom of said U-cut channels; and simultaneously cutting said work piece with a cutting tool moving in 3-dimensions homologously with said stylus; said tool being adapted to sweep a cone during rotation thereof, whereby a graphic is produced on said work piece having a width at the surface thereof and walls sloping to a depth at each point, which width and depth are proportional to the vertical excursions of the stylus during its pass through the U-cut channels of said master; thereby producing a graphic from said analogs having the attributes of a true engraving.
Claim 3
Dependent Claim
35 words
A method in accordance with claim 1, wherein the bottom of said U-cut channel are rounded, and wherein the bottom of said cylindrical stylus is rounded, to facilitate traversing of said stylus through said U-channels.
Claim 4
Dependent Claim
19 words
A method in accordance with claim 1, wherein said channels are traversed in a single pass by said stylus.
Claim 5
Independent Claim
234 words
A method for engraving 3-dimensional graphic intelligence upon a work piece, comprising: preparing a master wherein analogs of graphics to be engraved are defined by constant width U-cut channels, the center line of said U-channel defining a pattern geometrically similar to the said graphics to be engraved, and the depth of said U-channels being proportional at each point to the width at the surface of said work piece, of a graphic to be engraved; positioning said U-cut channel master at the master object receiving bed of a 3-dimensional pantograph engraving machine, and positioning said work piece to be engraved at the work piece receiving bed of said machine; traversing the U-cut channels defining desired graphics with a cylindrical stylus having a diameter approximating that of said U-cut channels, while maintaining the bottom of said stylus in contact with the bottom of said U-channels; and simultaneously cutting said work piece with a cutting tool moving homologously in 3-dimensions with the said stylus; the tool being adapted to sweep a cone during rotation thereof, whereby a graphic is produced on said work piece having a width at the surface thereof, and walls sloping to a depth at each point, which width and depth are proportional to the vertical excursions of the stylus during its traverse through the U-cut channels of said master; thereby producing a graphic from said analog having the attributes of a true engraving.
Claim 6
Independent Claim
234 words
A method for engraving 3-dimensional graphic intelligence upon a work piece, comprising: preparing a master wherein analogs of graphics to be engraved are defined by constant width U-cut channels, the center line of said U-channel defining a pattern geometrically similar to the said graphics to be engraved, and the depth of said U-channels being proportional at each point to the width at the surface of said work piece, of a graphic to be engraved; positioning said U-cut channel master at the master object receiving bed of a 3-dimensional pantograph engraving machine, and positioning said work piece to be engraved at the work piece receiving bed of said machine; traversing the U-cut channels defining desired graphics with a cylindrical stylus having a diameter approximating that of said U-cut channels, while maintaining the bottom of said stylus in contact with the bottom of said U-channels; and simultaneously cutting said work piece with a cutting tool moving homologously in 3-dimensions with the said stylus; the tool being adapted to sweep a cone during rotation thereof, whereby a graphic is produced on said work piece having a width at the surface thereof, and walls sloping to a depth at each point, which width and depth are proportional to the vertical excursions of the stylus during its traverse through the U-cut channels of said master; thereby producing a graphic from said analog having the attributes of a true engraving.
Claim 7
Dependent Claim
187 words
A method in accordance with claim 4, wherein said master is produced by the steps of: positioning at the master object receiving bed of said 3-dimensional pantograph engraving machine, a stencil plate carrying thereon voids, the boundaries of which define the said graphics; tracing the said graphics upon said plate, utilizing a conical tip stylus as the tracing element for said machine, the conical portion of said stylus having an included angle and axial length in relationship to said voids such that said element may traverse the entire graphic defined by its voids with the lateral edges of said cone at all times contacting and being limited in downward excursions by the edges of said voids at the surface of said plate, whereby the vertical excursions of said conical element into said voids varies in accordance with the separation of said edges at said plate surface; and utilizing simultaneously as the work cutting tool moving in homologous fashion with said tracing element, a rotating cutting tool of generally cylindrical cross-section, whereby said U-cut channels are produced having said characteristics of geometrical similarity, constant width and variable depth.
Claim 8
Dependent Claim
174 words
A method in accordance with claim 4, wherein said master is produced by the steps of: positioning at the master object receiving bed of said 3-dimensional pantograph engraving machine, an intermediate master wherein said graphics are defined by V-cut channels, the boundaries of which at the planar surface of said intermediate master are geometrically similar to the said outline of the graphic to be engraved on said work piece, and the depth of which at each point is similar to the corresponding depth of the said graphic to be engraved; tracing the said graphics on said intermediate master by a single pass through said V-cut channels, utilizing as the tracing element for said machine a conical tipped stylus having an included angle no greater than the included angle of said V-cut channel; and utilizing simultaneously as the work cutting tool moving in homologous fashion with said conical tipped stylus, a rotating cutting tool of generally cylindrical cross-section, whereby said U-cut channels are produced having said characteristics of geometrical similarity, constant width and variable depth.
Claim 9
Dependent Claim
186 words
A method in accordance with claim 5, including the further step of initially preparing said stencil plate by positioning at the master object receiving bed of said 3-dimensional pantograph engraving machine a line cut photo-engraving carrying graphics in configurations similar to those to be engraved on said work piece; positioning an intermediate master work piece at the work piece receiving bed of said machine; tracing all points of said graphics on said line cut engraving, utilizing as the tracing element for said machine a second cylindrical stylus having a diameter substantially less than the channels defining the graphics as said line cut machine; and utilizing simultaneously as the work cutting tool moving in homologous fashion with said second cylindrical stylus, a rotating cutting tool of generally cylindrical cross-section and of diameter matching that of said stylus, said intermediate master work piece further being positioned during said cutting operations at a plane higher than that in which said line cut photo-engraving is situated, whereby the corresponding channels produced at said intermediate master have sufficient depth to enable subsequent use of said intermediate master as said stencil plate.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |