Patent GB-345957-A (GB)
Title: Improvements in or relating to embossing machines
IPC: B41J3/38
Filed: 1929-12-24
Abstract: 345,957. Embossing-machines. ADDRESSOGRAPH CO., 901, West Van Buren Street, Chicago, U.S.A. Dec. 24. 1929, No. 6370/31. Divided on 345,674, [Class 100 (iv).] Type-wheel machines for embossing metal hammerimpression arrangements ; case-shift mechanism ; key interlocks; aligning for impression.-In machines for making printing-plates and the like comprising dies mounted in a rotary carrier, the carrier has two sets of complementary dies representing upper-case and lower-case characters, and means is provided for selectively operating either set. The carrier may be normally stationary, the keys controlling a stop for holding the carrier, and stops for arresting the carrier in selected positions. In the machine shown in Figs. 3 and 4 carriers A<1>, A<2> for sliding dies C, C', D, D<1>, the dies C, D and C<1>, D<1> being for lower-case and upper-case characters respectively, are secured to a shaft 8 connected by a slipping coupling 20 and gearing 11 to a shaft 16 driven by a motor. Sliding stops 75 operated by key-levers 131 co-operate with a stoparm 72 on the shaft to arrest the carriers for dieselection. The key-levers have hooks 91, Fig. 5, for engaging a locking-bar 92, and a pivoted bail 113 is provided for returning the key-levers when released. The die-carriers are held stationary between successive operations of the key-levers by means of an aligning stop 135, Fig. 3, described below, the arrangement increasing the speed of operation since time is saved if, for instance, the same character is repeated. Impression means for the dies C. C<1> comprises a hammer 40 on a rocking arm 25 connected by a toggle 29 to a shaft 28 which is connected by a toggle 30 and a link 31 to an eccentric on the shaft 16. The hammer operates either of two shuttles 41 connected to springs 51 and co-operating with pivoted fingers 42 arranged over the dies, the shuttles and fingers being carried by a rocking arm 44. Impression means for the dies D, D<1> comprises hammers 52 sliding in a cross-bar 53 and co-operating with shuttles 41 on a block 58 carried by a rod 37 which is mounted in a rocking yoke 26 and is supported by a strong spring 38. The yoke is connected by a link 35 to an eccentric 36 on the shaft 16. The shuttles are connected by links 63, 64 to levers 60, 61 abutting on a bell-crank 66 which normally holds the shuttles out of engagement with the hammers. The bell-crank is connected to a plunger 68 in the shaft 8, a head 70 on the plunger normally abutting on a latch 73 pivoted on the stop-arm. The die-carriers are, as stated above, stationary during the successive operations of the key-levers, and to permit repeated operation of the same key-lever the ends of the stops 75 and the latch 73 are bevelled. The levers 60, 61 co-operate alternately with a stop 82 on a sleeve 81 mounted on a stud 80 and provided with an arm 84 in the path of a sliding rod connected to a shift-key. The lever 6 is normally obstructed by the stop, but on operation of the shift-key the arm 60 is obstructed. A pivoted catch 89, normally released by the bell-crank 66, co-operates with notches to hold the sleeve 81 in either position. On operation of any of the key-levers 131, the associated stop 75 co-operates with the latch 73 to release the plunger 68, and shortly afterwards co-operates with the stop-arm 72 to arrest the shaft 8. Release of the plunger permits, under control of the stop 82, one of the springs 51 to move the front or rear shuttles into engagement with their hammers, and the arm 25 and yoke 26 thereupon cause the selected lower or upper-case dies to emboss the blank B. The arm is operated slightly in advance of the yoke, so that the upper die engages the blank before the lower die. For automatically returning the bellcrank 66 and plunger 68, levers 60, 61, and shuttles 41 there is provided a bell-crank 120, Figs. 3 and 5, connected by a link 125 to a lever 124 engaging the bell-crank 66. A rod 117 spring-mounted in a support 121 pivoted on the bell-crank 120 engages a pin 116 on a spring-urged lever 104 normally restrained by a cam 102 on a plunger 101 connected to the arm 44. When the arm 44 descends, the rod 117 is moved into the path of a lug 118 on the yoke 26 and on descent of the yoke the bell-crank 66 and associated members are returned. The locking- bar 92 is released and the rocking bail 113 is raised to return the key-lever by means of a rocking member 108 connected by a link 107 to the bellcrank 120. The member 108 can be operated also by means of a finger-lever 115, a telescopic part 107<1> of the link preventing operation of the bellcrank. The upper dies are returned by means of hooks on the arm 44, and the lower dies are returned by means of projections on the hammers 52, springs 21 on the carriers co-operating with notches to hold the dies in normal position. The fingers 42 and hammers 52 are returned by means of springs 45 and spring-urged levers 55. The aligning-stop 135, Fig. 3, slides in a guide 137 and co-operates with a notched flange 136 on the carrier A<2>, a lever 138 connected to the stop having a pin 143 co-operating with a bell-crank 141 connected to a link 145 having a slot 145<1> engaging a pin on the arm 44. The lever and bell-crank are pivoted on a pin 140 and are connected by a spring 144. A lever 150 has a pin 152 which normally engages the pivotal connection 139 of the lever 138 and stop and holds the stop in engagement with the flange 136. The lever 150 abuts on a link 156 connected by a lever 154, Fig. 5, and link 155 to the key-lever returning-bail 113. On depression of a key-lever, the lever 150 is released and the bell-crank 141 is rocked by the spring 144 and causes the lever 138 to withdraw the aligning-stop. On descent of the arm 44, the spring causes the lever to project the aligning- stop, and on return the key-lever the lever 150 re-engages the aligning-stop and holds it in projected position until the next operation of a keylever. Matrix carriages and supports; matrix feeding and damping arrangements ; platen-shift mechanism ; line-spacing mechanism.-A carriage L, Figs. 4 and 7, for the matrix or blank B comprises a base 160, a shift frame 168, and a line-spacing plate 183 provided with a clamp 182 for the blank B. The carriage base is provided with rollers 161 engaging rails K, and is connected to a belt 165 passing over rollers, one roller having a spring for urging the carriage towards the right. An escapement 202 co-operates for letter-spacing with a rack on the carriage base and is actuated by a key-lever connection 203. The carriage can be moved in either direction by means of a finger-plate 162. The shift frame 168 slides in guides on the carriage base and has rollers 169<1> engaging a bar 166 provided with pins engaging inclined slots in the upper rail K. When the shift-key is depressed an arm 170, Fig. 3, is rocked and an arm 175 is thereby permitted to rock a shaft 176 carrying an arm which engages a pin on the bar 166. The bar is thereby displaced and shifts the frame 168 to bring the blank into position for being embossed by the selected pair of upper-case dies. The line-spacing plate 183 slides in guides on the frame 168 and is moved rearwards for line-spacing by means of a finger-piece 185, a pivoted detent 186 co-operating with notches to hold the plate. The blanks are stacked in a magazine and the bottom blank is projected by means of sliding pushers. When the carriage L is moved towards the left, the pushers are automatically actuated.by engagement of cams on the carriage with rollers on the pushers, and the blank is engaged by the clamp 182. The carriage is then moved towards the right to bring the blank into the space between the dies, and one or more lines are embossed to produce a printing-plate from the blank. The machine may be associated with the mechanism described in Specification 345,674 for inserting new printing-plate in a frame and removing therefrom a disused printing-plate.