Patent GB-570800-A (GB)
Title: Improvements in duplicating machines
IPC: B41L11/00
Filed: 1944-03-09
Abstract: 570,800. Copying documents. FORD, F. R. March 9, 1944, No. 4384. [Class 100 (ii)] A machine for copying documents of the kind set out in Specifications 458,587, 483,403, 561,027 and 562,725 in which impressions from a master sheet bearing matter in reverse are obtained on a moistened copy sheet fed from a tray is constructed so as to be capable of printing the whole of the matter, or to print only one line or one paragraph of the matter, and the invention is described in connection with printing records of wages &c. in connection with the " Pay are you earn " system of deducting income tax. The machine is constructed with a pressure roller 36, Figs. 2 and 3, mounted in bearings 42 carried by rods 44 which can be arranged to trip the roller 36 upon a complete rotation of the roller 10 fitted with the master sheet. The roller 36 is fitted with adjustable sleeves 37, 38 for printing single lines, or paragraphs respectively, and these can be set to the desired printing position, or can be moved along the roller 36 to end positions in which they are out of action, the adjustment being effected when the roller 36 is tripped. To enable narrow strips to be printed (e.g. one for recording a week's wages, &c. for an individual workman), an auxiliary feed tray 15 is provided in addition to the main feed tray 13, and the tray 13 can be adjusted by sliding on a strip 16 of the main tray. The tray 13 is fitted with a slot 18 to guide a narrow strip into printing position, and with an adjustable side gauge 84 for adjusting a wide strip when fed to receive a single line impression on a part of the strip, and the gauge 84 can be set by the aid of a scale 86 for printing in correct register on a wide sheet data representing the weeks of a quarter. To the front of the tray 15 is secured by means of a support 33, a sheet guide 20, and spring fingers 25, 26 and an indicator 28 for positioning the sleeves 37, 38 correctly. The tray 15 is also provided with a shield 24 which engages the main moistening pad 12 upon which rests a pad 21 let into an aperture in the shield which wets the narrow sheet. Or the damping action may be limited by a masking sheet the aperture of which registers with an adjustable sleeve on the moistening roller 9 which is carried by spring-pressed levers 67, which are operated to raise the roller 9 automatically when the bearings 42 are operated to trip the roller 36. The rod 68, Fig. 9, which carries the levers 67 carries a stripper device having a wide stripper 77 for directing wide sheets to a guide 81 leading to a front receiving tray, and a narrow stripper 80 is arranged in a notch in the larger stripper and directs the narrow sheets to a tray 14. Cylinder trips. The rods 44 carrying the bearings 42 are controlled by means of lever arms 47 pivoted to sleeves 45 which slide on screwed extensions 57 of the rods 44 and transmit motion to the rods via springs 53, 54 engaging nuts 55, 56 on the rods. The printing pressure can be controlled by means of a lever arm 50 which operates a lever 49 on the shaft 48 of lever 47. The roller 36 can be raised at the end of a complete revolution by means of a spring-controlled lever 60 having a screw 59 which engages an arm 58 on shaft 48 to depress the roller 36, and moves to permit the roller to rise under spring action, when a cam recess 65 on the shaft of roller 10 permits clockwise movement of the lever 60. The cylinder 10 may be formed with a flat surface which permits movement of the sleeves 37, 38 when the cylinder is at rest.