Patent GB-746134-A (GB)
Title: An improved method of and apparatus for making corrections alterations and additionson a photo-type composed film or sheet
IPC: G03D15/00
Filed: 1954-03-16
Abstract: 746,134. Photographic type-composing. MONOTYPE CORPORATION, Ltd. (Halpern, B. R.). March 16, 1954, No. 7571/54. Classes 98 (1) and 98 (2). A method of making corrections, alterations or additions on a film or sheet of photographically-composed type by substituting a portion of film bearing required matter in place of a corresponding portion of the film or sheet, including the steps of locating a stripping film or the like bearing the required matter emulsion-side up with the bounding edges of the required matter in predetermined relation to a datum or basic gauge, cutting the emulsionbearing component of the stripping film or the like around the matter, positioning a transfer strip in a predetermined relation to the datum, adhesively attaching the cut-out portion of film component to the transfer strip and removing the transfer strip with the required portion of film component adhesively attached thereto, locating the original film or the like to be corrected, altered or added to emulsion-side up with the portion to be replaced in the same relation to the datum as that previously borne by the required matter-bearing portion of the stripping film, scraping or stripping off the portion to be replaced, applying the transfer strip to the film or the like in the same precise register to the datum so that the required matter-bearing portion of stripping film is caused to occupy the space vacated by the portion of the original film removed, and adhesively securing the required portion of the stripping film to the backing or base of the original film or the like. Apparatus for the method comprises a table A, Fig. 1, having a straight edge A<SP>1</SP> arranged to locate a side edge of the film or the like, sighting mechanism having an aperture b bounded on opposite sides by parallel edges B<SP>4</SP>, B<SP>5</SP> for sighting top and bottom bounding edges of an image such as a line of photographically composed type on the film or the like, and a straight edge B<SP>9</SP> for locating a transfer film, a locating support for the sighting mechanism, and actuating gear for effecting relative movement between the locating support and the table A in order to sight the image between the edges B<SP>4</SP>, B<SP>5</SP>. As shown, the table is slidably held on frame members A<SP>3</SP> (not shown) by cover strips A<SP>4</SP>, A<SP>5</SP> and has a straight edge A<SP>2</SP> parallel to edge A<SP>1</SP>. It is movable longitudinally by means of a shaft A<SP>8</SP> carrying a drum A<SP>9</SP> and a pinion A<SP>7</SP> which engages a rack A<SP>6</SP>. The sighting mechanism comprises two parts: one part B<SP>2</SP> carrying the edges B4, B<SP>5</SP> and the other part B<SP>3</SP> carrying edge B<SP>9</SP>. Both parts fit over pins B, Bl on the frame members A<SP>3</SP>. A stripping film carrying required lines of type matter is first prepared, and is fixed emulsion-side up on table A with its side edge in contact with edge A<SP>1</SP>, which is raised from the table. By turning drum A<SP>9</SP> a required line is brought into the space between the inturned lower edges of edges B<SP>4</SP>, B<SP>5</SP>, which are spaced apart just sufficiently to enclose the line by spacers B<SP>8</SP>. Pin Bl is eccentrically mounted and is rotated to adjust the inclination of aperture b slightly. A tool C, Fig. 6, has a cutting edge c slightly in-set with respect to a side face. A set of tools may be provided, corresponding in width to the spacers B<SP>8</SP>. By sliding the said side face along the inside faces of edges B<SP>4</SP>, B<SP>5</SP> parallel cuts are made in the emulsion. The part B<SP>2</SP> is then swung away, and transverse cuts are made to join the parallel cuts at their ends. One end of the strip of emulsion cut out is then lifted. A transfer strip of film or the like coated with an adhesive stronger than that holding the emulsion to its base is located against edge B<SP>4</SP> and pressed against the emulsion strip, which is then removed adhering to the transfer strip, covered with glassine paper, and put aside. Several such strips may be prepared. Where the required matter comprises several lines, incisions are made above the first line and below the last line, and the portion is removed as before. The original film bearing type-matter to be replaced or added to is fixed to table A in place of the stripping film, and a line to be replaced is brought into register with aperture b. The tool C has, at the end opposite edge c, a hook c<SP>1</SP> and a scraper c<SP>2</SP>, both parts being cut away at the sides to pass between the inturned lower edges of edges B4, B<SP>5</SP>. If the film is a stripping film, the unwanted portion is removed by hook c<SP>1</SP>, otherwise it is removed by scraper c<SP>2</SP>. The part B<SP>2</SP> is then swung away, and the glassine cover is removed from the transfer strip, which is placed on the original film in contact with edge B<SP>9</SP> so that the emulsion strip occupies the place of the matter removed from the original film, and pressed down. The transfer strip is then removed.