US1764969A - Rapid printing press - Google Patents

Description

June 17, 1930; w; MOCKEL RAPID' PRINTING PRESS Filed April 25, 1928 3 Sheets-Sheet l v June 17, 1930.

w. MGCKEL RAPID PRINTING PRESS Filed April 23, 1928 :s Sheets-Sheet 2 June '17, 1930. w. MOCKEL ,7 ,969

RAPID PRINTING PRESS Filed April 25, 1928 3 Sheets-Sheet 3 I Patented-June 17,

PATENT arm-E;

wrtmn from, gr'nnannwnurmrrmnor, dnamx mm ramrmc mass Application-filed April 23,1928, Serial Jim-272,800, aim in Germany April 30, 1927.

- This invention relates to printing machines with a fixed bed and an impression cylinder which is journalled in a reciprocating car riage and is rotated in the same direction dur- 5 ing the forward and backward motion of said carriage. The inventioh is characterised substantially in this, that for producing the rotary motion of the impression cylinder sup sorting the gripper mechanism in the same irection durlng the forward and back'travel of the carriage, movable upper and lower racks are provided at either side of the machine, which are raised and lowered by means of cams actuated by the driving wheel through intermediate gear wheels, in such a manner that the impression cylinder, in travelling over the bed during the printing stroke, engages the two lower racks and, when running idle over the bed, runs in the 11 per racks, the printed sheet being rolled o machine has the advantage that the sheets to be rinted can be piled up from the bottom to t e top of the machine, that the sheets'are fed over a shorter distance in a simplified manner, that the sheets are placed in position accurately and in a uniform manner, that the. sheets are removed smoothly by smoothly closing grippers, that the sheets are held by the grippers until the printing 0 eration is complete'and that the sheets are at the front end of the machine. The machine hasneither lower nor upper belts, nor cords, nor lifter bars. The ink runs in a uniform manner from the ink duct over the distributing rollers to the form and the freshlyprint- .ed sheets can be piled from the top of the machine to the bottom. Astationary foundation is provided, which is supported at all points, and a stationary ink duct directly next to the feed table and the machine is driven from the middle. 1

In the accompanying drawing one constructional form of a printing machine is shown by way of example,

machine in a working position, in which the impression cylinder carriage is at one end of its travel,

Fig. 2 the other side elevation, similar to screwed into tapped holes 301 and bearing From the constructional point of view, the.

elivered" Fig. 1 being a side; elevation of the printing the side walls of the machine frame.

Fig. 1, and Fig. 3 the transmission gear for driving the im ression cylinder.

The machine 1s driven by a motor 1 mounted in the middle ofthe machine, which is connected to the main driving shaft 200 for instance by a rope or belt drive 201. On the driving shaft 200 are mounted the small toothed wheels 1, the teeth of-which mesh with the large toothed wheels 2 which are mounted at either side of the rinting machinebeing fixed on a shaft 202 ournalled in the side walls 16. ,The toothed wheels 2 are each fitted with a radially adjustable bar 3, to the unsupported outer end of which a connectin rod 4 is pivoted, the other. end of which as a slot 401 in which a bush 5 mounted on a shaft 501 is 'adjustably fitted. The bars 3 are of triangular section slidable in V slots in the wheels 2 and are secured by bolts against washers straddling the slots. On the shaft 501 at either side of the machine is mounted a large rockin wheel 6, on the lower part of which is a set 0 teeth 7 V which meshes with the-teeth of a fixed rack 8. The rotary motion of the rocking wheels 6 is transmitted by the pin 9 and the push bar '10 at either end of the impression cylinder 12 tothe shaft 11' of the latter which is journalled in the side walls '15 of the impression cylinder carriage 13. Through the regular drive of the push bars 10-at either'e'nd of the impression cylinder 12 a to and fro'motion of the printing carriage 13 is obtained, in which besides the impression cylinder 12 the inking mechanism 29, 30, 31 for distributing the ink is housed By adjusting the bars3 radiall on the wheels 2 and adjusting the position 0 the bush 5'in the slot 401, the extent of the to and fro motion of the carriage can be regulated to the desired amount.

In order that the reversal of the motion of the carriage 13 shall be as free from shock as possible, yielding buffers 14 can be provided in the vertical outeruprights 44, 44 of frame we edge of the side parts on either side. Durin the printing operation the rollers 18 provi e a good abutment a ainst the upper lateral members 19 of the rame so'that the impression cylinder 12 cannot give in the vertodownwardly extending bars 92 having at their lower ends antifriction rollers 903 l which engage intermediate cams 254 fixedon tical direction. The upper lateral members 19 are. strengthened by upright members 20, 21 connecting .them to the side walls 16, so that the lateral members 19 cannot bend or give, during the printing operation. Broad ribs are provided on either side of the bed for ensuring that the impression cylinder 12 shall roll smoothly over the bed. The circumference of thefimpression cylinder must correspond to twice thelength of the type form, one half for the printing operation and the other flattened half for the idle return motion of the impression cylinder over the form, the latter half also housing the grippers, clamping means and elevating bars.

' The rotary motion of the impression cylinder 12 is imparted to it by means of gearteeth on the cylinder which engage alternately lower and upper racks 23, 24, said gear teeth, when the cylinder is travelling over the form (forward motion), running in the two lower racks 23 provided at either side .of the machine and, when the cylinder is running idle over the form, engaging in the upper racks 24. This enables the impression cylinder al ways to rotate'in the same direction.

The raising-and lowering of the racks 23 and 24 is effected by means of cams 25 which are driven through intermediate wheels by driving wheels26 fixed on the shaft 202 of the toothed wheels 2. The racks 23, 24, are connected together at their ends by means of upright'bars 90,91 and are slidable vertically in guides not shown) on the side members of. the machine frame, said bars projecting below the lower racks and having mounted on their lower ends antifriction rollers 901, 902 which 'engagethe cams 25,255 which are fixed on shaft 251, 253, journalled in the side :walls of the machine. Intermediately of the ends of the lower racks are fixed therea shaft 252 journalled in the side walls of the machine. On the shaft 251 is fixed a gear wheel 274 which meshes with a gear whee-l 273 rotatably mounted on the machine frame and meshing with the wheel 26. On the shaft 252 is fixed a gear wheel 276 which is rotated by the wheel 26 through the intermediary of idler gear wheels 272, 275, the wheel 276 in turn driving a ge'ar wheel 282 through the intermediary of idler gear wheels 277, 278,

279, 280 and 281. The setting of the came 25, 254, 255 is such that at the commencement of the forward motion ofthe carria e i I i 13, the twolower racks 23 are in their big est position and have their teeth in engagement with the rings of teeth on the printing cylinder 12. The cams havela circular portion on which the rollers 901, 902, 903 rest during the forward, motion 13, whereby theteeth on; the cylinder 12 remain in engagement with the teeth ofrthe lower racks. At the end of the forward nd tion of the carriage, the rollers pass on to portions of the cams, the surfaces of which of the carriage are nearer the centres of rotation of the cams than the surfaces of the circular portions so that'the racks 23 and 24 are lowered simultaneously so that the lower racks 23 cease to engage in the rings of teeth on the impresengagement with the said teeth. During the turn travel of the carriage and the impression cylinder 12 the racks 24 remain in engagement with the teeth of the cylinder whlchthus rotates in the same direction. During its return motion the cylinder rolls ed the printed sheet while the half of the printing cylinder of reduced diameter rolls over the form. 'At the commencement of the next forward motion the racks 23, 24 are raised and v the lower racks 23 a ment in the rings 0 cylinder 12, the racks ain enter into engageteeth on the printing 24 coming out of en' gagement, the operation being repeated.

11 the side parts 15 of the. carriage 13 the three ink distributing rollers 29, 30, 31 for inking cylinders is efiected by a two-armed lever 34 (Fig. 1) one end of which engages ina serpentine groove in a bar 35 at the side of the bed. Of the three ink applying rollers, the two larger ones 36, 37 (Fig. 2) bear against the distributing roller 29 lying nearest to the'impression-cylinder 12, while the smaller roller 38 bears against the other distributing roller 30. The messenger roller 39 rests on the small upper inking cylinder 31 1s journalled at either end in bearings slidablein guiding bars 41 against the action' of compression springs 40 on the side faeingthe impression. cylinder, so as to becapable of yieldingwithin certain limits. 42 (F ig. 2) with the ink duct roller 43 is 'sion cylinder and the racks 24 enter into The ink'duct mounted on the upright 44 'of the side wall.

The ink duct roller 43 is rotated by bevel wheel gearing 45 from the cam shaft 251.

v The ink duct roller 43 is so arranged that it moves slightly into the ink duct during the latter part ofthe motion of the carriage 13 so as to enable the messenger roller 39 before rneaeee the end of the forward motion of the car;

. carriage, its guiding bars ria e 13 to come into contact with the ink duct I the'messenger roller 39 breaks contact with per rod 53 and the levers 50 and 54 are conto grip the upright 44 the ink 'duct roller 43 somewhat later, after which it bears under the action of the springs 40 against the inking cylinder 31, transferring the ink which it has withdrawn to the latter.

As the impression cylinder 12has a rotary motion but the cylinder grippers are required sheet without a jerk, the grippers must move faster than the cylinder 12 before the latter receives the fresh sheet'to be print ed from the feed table 66, the motion of the grippers thus being more rapid list before the sheet is received than the perip eral speed of the rotating printing cylinder. With this object in view, a cam lever 47, pivoted on the and to which motion is imparted by? a cam 46 oh the shaft of the wheel 281 i g. 2), engages under the roller 48 on the gripper cam 49.. The cam 46 engages a roller 461 on a rod 471 which is pivoted to the cam lever 47 and raises the roller 48 with the grip-. per cam 49 and lowers it again at the requisite moment to. such an extent that the closing of the grippers and the commencement of the forward motion of the carriage take place at the same time. On the shaft 51 the gripper bar 52 is mounted and on the same shaft is loosely mounted the gripper cam 9. I The grippers themselves are screwed to the gripnected rigidly to the gripperrod 53 which is movably journalled in the gripper bar 52.

' By the lever 54 which strikes against the fixed stop 57 the machine frame F1g. 2) the grippers are opened at the end 0 the printing operation. k, .2 1

A suctionbar 71 which is raised and lowered by means of a lever 7 2rocked throlggh the intermediary of a rod 721 by the-cam 7 picks up the sheet as soon as the grippers open.

' The cam 73 is fixed 6n the connecting shaft 202 of the two large toothed wheels 2, preferably immediately at the side of the machine. The band frame 74 is connected by-a system of levers and links 75, 7 51 752, 753,'with the cam 7 6 (Fig. 1) which is also mounted on the connecting shaft 202 of the two large toothed wheels 2, preferably on the opposite side of the cam 73 and thus has "the requisite rotary motion imparted to it by the toothed wheels 2. When" the suction bar 71- (Fig 2) has taken hold of and slightly lifted the printed sheet, the band frame 7 4 is pushed under the printed upon the band; without the bands travelling. The rear band sheet which is rolled by the printing cylinder 12. vWhen the printed sheet rests over its entire surface on the'band frame 74, the suc 7 tion bar 71 again releases the sheet,- whereframe 74 moves back againshaft'77 ma be ri 'dly connected bya conpling with t e' toot ed wheel 7 8 which .othe'rw wise turns 78 meshes with a 'fixed rack 79. The two-. armed lever 80 with a roller 80, which strikes against the stops 81, 82 and connects and disconnects the coupling, causes the bands to loosely on it. The toothed wheel I travel only when the band frame 74 is pushed I under the printed sheet, for rolling at the same time another-sheet towards the rear on ferred to, the further advantage of taking upa minimum amount offspace. Thus, for instance, for a size of paper 92 x 118, correspondlng' to aprinting form of 16 pages post quarto, w

The circumference'of the printing cylinder is 2.00 m.

The width of the printing cylinder 1.40 m. The length of the machine without the pile of aper 3.50 m.

he len of paper 3.50 m.

lhe overall height of the mace 1.50 m. The width of the machine 2.20 m, What I claim is: 1. A rinting machine having a stationary type be an impression cylinder capable of rolling over the said bed, a carriage in which the impression cylinder is journalled, means for imparting a forward and backward mm h of the machine with the pile said ring of teeth during the forward operative motion of the cylinder and for movin the up er rack into engagement with the sai ring 0 teeth during the backward idle motion of the cylinder and delivery of the printed sheet, as and for the purpose set forth.

2. A rinting machine having a stationary type bed, an impression cylinder capable of rolling over the said bed, a carriage in which the impression cylinder is journalled, means for imparting a forward and backward motion to the carriage and cylinder and means for imparting a rotary motion to the cylinder in the same direction both during the forward and backward motion of the cylinder, the said latter means comprising a ring of teeth on the cylinder, an upper and a lower rack and I means comprising a driving wheel; toothed v wheels, a ti'ain of intermediatewheels a cam for bringing the lowerrack into engagement with the said ring ofteeth during the forward operative motion of the cylinder and H for bringin the upper rack into engagement with the said ring of teeth during the backward idle motion of the cylinder and delivery' of the printed sheet, as and for the purpose set forth.

In testimonywhereof I have signed my name to this specification.

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