GB687613A - Improvements in photo-electric engraving - Google Patents

Improvements in photo-electric engraving

Info

Publication number
GB687613A
GB687613A GB1528/51A GB152851A GB687613A GB 687613 A GB687613 A GB 687613A GB 1528/51 A GB1528/51 A GB 1528/51A GB 152851 A GB152851 A GB 152851A GB 687613 A GB687613 A GB 687613A
Authority
GB
United Kingdom
Prior art keywords
point
engraving
tool
conical
photo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1528/51A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WALTER CRAWFORD HOWEY
WILLIAM RANDOLPH HOWEY
Original Assignee
WALTER CRAWFORD HOWEY
WILLIAM RANDOLPH HOWEY
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WALTER CRAWFORD HOWEY, WILLIAM RANDOLPH HOWEY filed Critical WALTER CRAWFORD HOWEY
Publication of GB687613A publication Critical patent/GB687613A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

687,613. Engraving. HOWEY, W. C., and HOWEY, W. R. Jan. 19, 1951, No. 1528/51. Class 100 (ii). [Also in Group XL (b)] In a process of engraving a sheet of material for copying an original design by means of photo-electric scanning in which an oscillating engraving tool is used having its depth of cut controlled by the photo-electric cell, the tool (Fig. 3) has a shank formed towards the end with a square portion 15 tapered at a uniform angle towards a point 14 formed with a larger angle of taper. As shown, the point 14 is conical. In an alternative embodiment, Fig. 4 (not shown), the point is pyramidal. The tip 24 may be slightly rounded. Fig. 6 shows the impressions formed with a tool having a conical point. The impressions formed are wholly conical for shallow cuts and become square in cross section merging into conical shape for deep cuts 22. The upstanding portions between deep cuts have a steep pillar-like structure and are not easily crushed when a matrix is taken from the sheet under pressure. For engraving celluloid, the tool is heated electrically by a coil surrounding the shank and is clad with a layer of copper so that heat is readily conveyed to the point. Typical dimensions for the tools are given.
GB1528/51A 1950-04-13 1951-01-19 Improvements in photo-electric engraving Expired GB687613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US155633A US2699720A (en) 1950-04-13 1950-04-13 Half tone engraving process

Publications (1)

Publication Number Publication Date
GB687613A true GB687613A (en) 1953-02-18

Family

ID=22556190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1528/51A Expired GB687613A (en) 1950-04-13 1951-01-19 Improvements in photo-electric engraving

Country Status (2)

Country Link
US (1) US2699720A (en)
GB (1) GB687613A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075042A (en) * 1959-12-23 1963-01-22 Fairchild Camera Instr Co Cold cutting technique for half-tone electronic engraving
CH386126A (en) * 1962-11-30 1964-12-31 Pripart S A Method for sound recording of a postcard having a film in which is engraved a spiral groove, device for implementing this method and recorded postcard obtained by said method
GB1383238A (en) * 1971-03-13 1975-02-05 Victor Company Of Japan Phonograph pickup stylus
BE792488A (en) * 1971-12-08 1973-03-30 Dainippon Printing Co Ltd IDENTIFICATION CARDS AND METHOD FOR MANUFACTURING SUCH CARDS
TWI453107B (en) * 2011-07-11 2014-09-21 Benq Materials Corp Manufacturing method of roller used for manufacturing patterned retardation film
KR102404055B1 (en) * 2017-09-11 2022-05-30 오라폴 아메리카스 인코포레이티드 Method and apparatus for manufacturing retroreflector prism with polygonal aperture

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US274957A (en) * 1883-04-03 Punch for nut-machines
US724929A (en) * 1901-12-23 1903-04-07 Henry C Osborn Method of engraving.
US747738A (en) * 1903-02-11 1903-12-22 Bernhard Ludwig Process of producing celluloid printing-plates.
US891516A (en) * 1908-01-13 1908-06-23 Edward K Abery Metal-punch.
US1849544A (en) * 1930-01-31 1932-03-15 Howey Walter Process of and apparatus for producing printing plates
US2063614A (en) * 1931-12-14 1936-12-08 Mackinner Corp Method and apparatus for making printing plates
US2086798A (en) * 1932-06-22 1937-07-13 Greenberg Otto William Photoelectrical device for producing half-tone cuts
US2092765A (en) * 1932-12-19 1937-09-14 William A Hughes Electric machine
US2149487A (en) * 1934-05-15 1939-03-07 Myron C Zilberman Half-tone engraving and apparatus for and method of making the same
US2226086A (en) * 1935-08-13 1940-12-24 Miehle Printing Press & Mfg Printing
US2179002A (en) * 1936-03-04 1939-11-07 Jr George Washington Method and means for reproducing pictures
US2209183A (en) * 1937-04-03 1940-07-23 Automatic Engraving Machine Co Printing plate and method of and apparatus for producing it
US2238601A (en) * 1939-10-26 1941-04-15 Bell Telephone Labor Inc Telephotography
US2442022A (en) * 1944-08-03 1948-05-25 Emil S Schulz Method of and means for making cast printing plates having shaded designs

Also Published As

Publication number Publication date
US2699720A (en) 1955-01-18

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