Patent GB-190721874-A (GB)
Title: Improvements in and relating to Printing Presses
Inventor: SEFTON-JONES HERBERT
Filed: 1907-10-03
Granted: 1908-05-21
Abstract: 21,874. Jones, H. Sefton-, [Mills Automatic Press Co.]. Oct. 3. No Patent granted (Sealing fee not paid). Cylinder machines with plane printing- surfaces; feeding sheets.-A modification of the printing - machine described in Specifications Nos. 15,933 and 21,806, A.D. 1905, comprises a reciprocating typecarrying frame 33, Fig. 5, a verticallymovable forme box 36 carried by the frame, an intermittently - travelling pile carrier 106, and a reciprocating rotary impression cylinder 37 provided with an air chamber 46 with ports 47 in its periphery for sucking the lowest paper sheet on to the cylinder 37 when fed by the pile-carrier 106. The frame 33 is reciprocated along inclined guides 34 by belt gearing acting through spur gearing 25, 26, Fig. 1, a shaft 27, a balanced crank 28, a connecting rod 31, and an arm 32 on the frame, and the forme box is raised and lowered in a pocket 35, Fig. 5, in the frame 33 by shafts 38 formed with flattened surfaces on which the box rests in the depressed position, the shafts being partly rotated by levers 39 connected to a frame 40, 41, which rolls in one direction along a track and in the opposite direction along an inclined pivoted switch 43 and' an,upper track 45. The impression cyliuder 37 is rolled in the opposite direction to which the type frame moves by a spur-wheel 77 on one end of its shaft 49 gearing with a rack 78 on the type frame, and a spur-wheel on the other end gearing with a fixed rack, the bearing-blocks of the shaft 49 sliding in guides 51. The air chamber 46 communicates through the hollow shaft 49 and a flexible .pipe 58, Fig. 1, with a valve casing 61 provided with a piston-valve 63, Fig. 9, and connected through a pipe 74, Fig. 1, with an air-pump 73, the pistonvalve alternately connecting the flexible pipe 58 with the air-pump, or with the atmosphere in such a manner that the air is exhausted from the air chamber 46 at the same time as the pile carrier 106 brings one end of the paper sheet over the ports 47. The hollow piston-valve 63, Fig. 9, is operated by a cam 70 on the shaft 27 bearing against the valverod 66, which is held in contact therewith by a spring 65 inserted between the valve and the perforated end 64 of the cylinder, and the air piston is operated from the cam by a connecting-rod 71. The fingers 141, Fig. 4, forming the bottom of the slidable pile-carrier, are mounted in guides 142, and are fastened to a back plate 96 mounted on an adjustable slide 144 secured to the pile-carrier 106 by wing-nuts. Guide-plates, adjustably mounted on the plate 96, prevent lateral displacement of the paper. The front plate 98, Fig. 5, of the carrier is hinged to an adjustable arm 100, and is swung outwards by the casing of the chamber 46 against the action of a spring 102, the plate afterwards springing back, thereby packing the paper. The pile-carrier is connected by an adjustable connecting-rod 107, Fig. 1, to a lever 109 having a slotted arm 113 in which a roller 115 on the pivot uniting the rod 31 and the arm 32 slides, the slot in the arm being so shaped that the paper is brought above the ports 47 just before the carrier reaches its extreme forward movement. The other sheets are supported immediately the front end of the lower sheet drops on to the cylinder 37 by angularly-adjustable fingers operated by an L- shaped frame 120, a roller on which engages a track 122 on the pile-carrier. The delivery device 86, Fig. 18, is held in the raised position by curved arms 89 bearing on disks 88, except when the arms 89 engage the cut-away parts of the disks, in which case fingers on the device 86 engage with grooves 84 in the part of the impression cylinder formed by the casing of the chamber 46 and lift the paper off the cylinder ; an upwardly-extending arm on the device 86, by engaging a lug on the frame, prevents the device from dropping when the chamber 46 is being exhausted, and a friction roller 81 keeps the paper in engagement with the cylinder just as the exhaust is cut off. The inking-rollers 94, Fig. 5, are fed by a roller 93 from an ink fountain 92 carried by the type frame, and surplus ink is removed by rollers 95. The forme box is prevented from being raised, when the supply of paper is exhausted, by means of an arm 132 engaging under the hinged switch 43 and retaining it in the raised position. A cylinder 124, connected with the pipe 58, Fig. 1, communicating with the impression chamber, is provided with a plunger forced into the outer position by a spring and connected through a connecting-rod and a crank to the arm 132 so that, when the vacuum in the pipe 58 is destroyed by the ports 47 being uncovered, the arm 132 holds the switch 43 in the raised position.