Patent GB-949457-A (GB)
Title: Improvements in the photographic production of justified lines of type matter
Inventor: LEMCHE JOHAN HENRIK
IPC: B41B13/08
Filed: 1959-02-09
Abstract: 949,457. Photographically justifying unjustified lines of type matter. CARTOPRINT A.S. Feb. 9, 1960 [Feb. 9, 1959; April 24, 1959], Nos. 4464/59 and 14172/59. Heading B6W. [Also in Division G2] A justified line of type matter is produced by preparing unjustified lines, measuring the length of such a line by scanning it with a " safe " light, presenting the line to an optical system to project its image on to a photographic recording surface, adjusting the projection system in accordance with the measured length of the line to cause the image to have a predetermined justified length, and then illuminating the line of text matter for projection on to the photographic recording surface by means of a flash from a flash lamp. Typically, the optical system includes means adjustable to cause a chosen anamorphosis of the image in a direction lengthwise of the line of matter and to shift the justified line image bodily so that the margins of successive lines are vertically aligned. As shown, unjustified lines 3 of typewritten matter on a sheet 1 having feed perforations 2 are provided with marks 4 indicative of the line length and the justification treatment it is to receive at a fixed distance from the line end. For justification of complete lines by anamorphotic stretching or contraction of the line as a whole, the line length must be such that the marks 4 are located within the zone X, while for justification of half length, i.e. column lines the marks must be within the zone Y. Lines 3x which are initially of the required length are denoted by marks 4<SP>X</SP> in the middle of the justification zone X. Lines of non- justifiable length which are to be reproduced quadded left without any length alteration are similarly identified as indicated by the top two lines in Fig. 1. Half length column lines which are to be justified are provided with perforations 45 if they are to be set in the lefthand column and with perforations 45, 46 if they are to be set in the right-hand column. If a typewritten line is not to be reproduced, a perforation 38 is applied against it. Corrections may readily be effected by pasting the correct line over the erroneous one. A sheet 1 so prepared is fed intermittently a line at a time by a sprocket 5 through the photographic projection gate while a light-sensitive film 11 is fed in synchronism therewith by a sprocket 10, both sprockets being driven from a main shaft 7. During the stationary period of the sheet, continuously driven cams 16, 16<SP>1</SP> cause measuring units 12, 12<SP>1</SP> each comprising a non-actinic lamp and a photocell to scan the line, and simultaneously prisms 26, 27 are rotated about their pivot axes by followers 32, 33 engaging continuously rotating cams 28, 29 so that depending on the positions of the prisms the image is expanded or contracted along the line. A further cam 36 moves a lens 24 so that the left-hand margin of the projected image area remains fixed. For normal length lines a changeover switch 51 is set so that the output of the unit 12 is effective. When the mark 4 for the line is sensed the output is fed along line 20<SP>1</SP> via amplifier 20 to operate the trigger 21 for the flash lamp 19 to record the line on the film 11. If the sheet bears half length (column) lines a perforation 45 alone or with a perforation 46 (shown in Fig. 2, displaced from the Fig. 1 position for clarity) are sensed by infra-red lamp and photo-cell units 47, 48 and 52, 53. For left-hand columns cell 48 only is energized to send via line 49 and amplifier 50 a signal to the changeover switch 51 so that scanning unit 12<SP>1</SP> becomes effective. For right-hand columns cell 53 also is energized causing solenoid 56 to displace lens 22 and hence the projected image bodily. If a line is not to be recorded perforation 38 causes energization of photo-cell 39 which causes disengagement of a clutch 43, so preventing film advance, and operates a relay 44 to cut-off the lamp-triggering impulse. If a line to be recorded is too long or too short to fall within the length adjustment range a special mark can be placed on the sheet outside the range of the photo-cells 14, 14<SP>1</SP>, 39, 48, 53 so that recording is not effected and a warning signal given so that correcting action can be taken.