Patent GB-190124007-A (GB)
Title: Improvements in Printing Machines.
Inventor: NEWTON HENRY EDWARD
Filed: 1901-11-26
Granted: 1902-01-16
Abstract: 24,007. Newton, H. E., [Hoe, R.]. Nov. 26. Rotary machines; cutting, associating, and delivery apparatus ; set-off preventing; folding paper.-Relates to machines for producing papers such as weekly periodicals, which have a considerable number of pages, with or without a cover, and in which the number of pages may vary considerably ; to means for preventing smearing or setoff of printed webs passing round stationary guide bars or rollers ; and to the construction of the cutting-blades of the cutting-cylinders which cut the webs into sheets. Fig. 1 shows a diagrammatic elevation of a machine constructed in accordance with the invention, Fig. 3 a plan of the means for associating the webs, and Fig. 4 a section on the line 4-4, Fig. 1, showing the associating, cutting, and delivery mechanism. Four printing-couples A, B, C, D, each consisting of a forme cylinder 2 and an impression cylinder 3, are arranged two on each side of the machine, with the associating-mechanism between them. The forme cylinders are outside the impression cylinders 3, so that the latter may be accessible for making ready. The inking- mechanisms 6 may be mounted on sliding frames 7, which may be moved back to give access to the forme cylinders. The couples A, B perfect one wide web, or a wide web Y and a narrow web Z which is to form the cover, and the couples D, C perfect a wide web W. The formes are preferably arranged 10 that the columns run longitudinally of the cylinders 2. The gearing is so arranged that the couples A, B may be driven at full or half speed. The web Y is cut longitudinally into three narrow webs by slitters 28, 29 on a shaft 27, and the web W is cut into four narrow webs by slitters 23, 24, 25 on the shaft 22. If a cover web Z is not used, the web Y may be of full width and cut into four, another slitter being provided on the shaft 27. The narrow webs are turned into paths at right-angles to that of the main webs, and associated one over the other in two batches, by two sets of diagonal turning-bars 31 arranged one set above the other. The bars 31 of each set are parallel. The ends 32, 33 of the bars 31 are arranged to slide in boxes 36, and each bar may be adjusted in position by means of a screw 37 &c. The narrow webs W<1>, W<2> W<3> W<4> pass over guide-rollers 40, in adjustable arms 41, to a pair of nipping-rollers 48, 49 by which they are guided to the nipping-rollers 52, 53. The narrow webs Y', Y', Y<3>, Z pass over guiderollers 40, 44, and 45, and, when the couples A, B are driven at full speed, the webs are led to the nipping-rollers 50, 51, and pass with the webs W to the nipping-rollers 52, 53. The nipping-rollers 48, 49,50, and 51 are arranged in such positions that the outer webs in passing between them do not engage any considerable part of their circumference. The associated webs pass to the cutting and collecting cylinders 54, 55 provided with the usual arrangement of cutting blades and blocks and sheet-carrying pins 71 &c. The collected sheets are folded by blades on the cylinder 55 into the grippers 82 of the delivery cylinder 83, which delivers the sheets to tapes 86. When the couples A, B are driven at half speed, the webs Y, Z are led, as shown by the dotted lines, Fig. 4, to a pair of nipping-rollers 87, 88, and thence to cutting- cylinders 89, 90. The sheets are transferred from the cylinder 89 to the collecting-cylinder 55, on which they are associated with the webs W, by a transfer cylinder 104. The cylinder 104 is driven at variable speed by elliptical gearing or other suitable means, so that it is moving at the same surface speed as the cylinder 89 when it takes the sheets therefrom, and is then accelerated so that it is moving at the same surface speed as the cylinder 55 when it delivers the sheets thereto. Fig. 7 shows a plan of means for preventing smearing or offset. In this arrangement, a web passing over the slitting-roll 110 is divided by a slitter 111 into two sections A, B, and these are associated by passing over the turning-bars 112, 114. To prevent smearing or off-set, an endless band 118 is passed round the bars 112, 114 between them and the webs A, B and travelling at the same speed as the webs. The band 118 passes from the slitting-roll 110 along with and under the half web A, round under the bar 112, over turning- bars 119, 120, between a pair of driving-rollers 121, rotated by gearing, round a turning-bar 123, and thence with the half web B round the bar 114, whence the band passes round the roller 117 and round a turning-bar back to the slitting-roll 110. The band 118 may be formed with longitudinal ribs or projections for engaging the unprinted margins of the web. In another arrangement, the turning-bars for the printed webs are formed with helical projections engaging the outside margins of the webs, and in conjunction with these endless narrow bands pass over the bars engaging the central part of the webs. The bands are endless, being guided on suitable arrangements of pulleys, and are driven at the speed of the webs. Web guides or rollers round which printed webs are passed are formed with end projections engaging the margins of the webs, and with intermediate discs, preferably loose and free to rotate, having serrated edges which act to keep the web from the surface of the roller or guide. The cutting-blade, Fig. 20, is formed of a series of blades 59 fixed together and having the teeth of one opposite the spaces between the teeth of the next. The blade shown consists of two blades 59, 59<a> fixed together by screws. When sharpening, it is only necessary to sharpen the upper parts of the side edges of each tooth c, as only the outer ends of the teeth are operative when the two blades are fixed together.