Patent GB-225852-A (GB)
Title: A gold or other foil stamping machine
IPC: B41F19/06
Filed: 1924-12-03
Abstract: 225,852. Patented Machinery Development Corporation, and Schwarzmann, L. Dec. 3, 1924. Index type-wheel machines for embossing bookcovers; type-carriages; type-wheels.-A machine for embossing book-cover titles in gold or silver foil comprises a type-wheel revolubly mounted on a rocking support which can be depressed to impress the selected character on a book-cover supported on a stationary table, the type-wheel support being provided with letter-spacing and linespacing mechanisms. To soften the foil-adhesive, the type-wheel may be heated, preferably by an electric resistance. A frame 2, Figs. 1 and 2, is provided with a table 5 for the book cover and has guide 6 supporting a slide 7 provided with a transversely movable carriage 22 carrying a rocking member 51 on which is mounted the printing-head P, Fig. 12. The printing-head comprises a plate 100 having a hub 101 supported by screws 57 on the member 51 and adjustably secured by a spring or hinged bar 123. A typecarrying disc 107 is feathered to a sleeve 102 which is revoluble in the hub 101 and is feathered to a rod 112 provided with a knob 111 having a screw 116 engaging a groove in the sleeve. The rod is provided with a bevel-wheel 118 normally engaging a tooth 105 on the hub, engagement being maintained by a spring in the knob. The disc 107 is furnished with a number of typewheels 129, there being one for each character and each having a number of types representing the same character in different styles. The typewheels are mounted in bearings 130 each consisting of a pair of members secured together by screws and pins, and secured to the disc 107 by a plate 128, the disc having a rib 135 entering notches in the members. The type-wheels are inter-connected to rotate in unison by means of loose coupling-piece 141 each consisting of two half-discs arranged at right-angles and engaging recesses in the hubs 139 of the type-wheels or in bushings secured thereto; or the type-wheels may be interconnected by means of gears formed on the hubs or bushings. For simultaneously rotating the type-wheels, the disc 107 is provided with a master-wheel 146, Fig. 18, which is arranged in the same manner as the type-wheels and can be rotated by means of a tool inserted in holes 149. The master-wheel and type-wheels are locked in adjusted position by rocking a plate 152 having teeth for entering holes 154. The plate 152 is revoluble on the plate 128 and is rocked by means of a finger-lever 156 having an eccentric 158 engaging a slot in the plate 152. The master-wheel is provided with style-indicating marks 151, preferably the letter H in different styles, which are set with reference to pointers 167 at the sides of a slot 166 in a cover-plate 164, the setting of the master-wheel causing all the type-wheels to present types of the same style. The cover-plate is provided with indexcharacters 168 which pass under a pointer 169 on a hood 172 secured to the plate 100. After rotating the master-wheel to select the style of type, the type-wheel bearing the required type is brought into position by depressing and then turning and releasing the knob 111. The printing-head is then depressed for impression by means of a pedal 63, Figs. 1 and 2, connected to a rock-shaft 59, an arm 53 of the member 51 being connected to a block 70 sliding on a crossrod 68 secured to blocks 69 sliding on links 65 which are depressed by the rock-shaft. The stroke of the pedal is limited by stops co-operating with an arm 88 on the rock-shaft 59. On removing the knob 111, Fig. 12, the disc 107 and parts carried thereby can be replaced by a similar disc equipped with different type-wheels, or by a disc having integral types for printing special characters, or bv a disc equipped with clamps adapted to hold loose types which are set up to print words ; the clamps are preferably operated by right and left handed screws. The type-wheels may be heated by means of an electric resistance consisting of a ribbon 193 wound on a mica ring 193 which is housed in a recess in a plate 190 secured to the plate 100, the ring and ribbon being enclosed in mica sheets 195. Letter-spacing mechanism. - The type-wheel carriage 22, Figs. 1 and 2, is fed step by step by means of ratchet-mechanism in connection with the shaft 59 operated by the pedal 63. A segment 73 on the shaft gears with a pinion 74 secured to a bevel-wheel 75 which gears with a loose bevel-wheel 77 on a shaft 30. A gear 28 feathered on the shaft engages a spiral pinion 27 on a screw 26 which is mounted in the slide 7 and engages a nut 24 on the type-wheel carriage. An arm 82 secured to the bevel-wheel 77 carries a pawl 83 co-operating with a ratchetwheel 79 on the shaft 30. On depressing the pedal, the pawl rides idly over the ratchet-wheel and on release of the pedal, the members are returned by a spring 81 and the ratchet-wheel is turned. The stroke of the rocking member 51 is reduced to permit of spacing being effected without impression by interposing a stop 94 in the path of the arm 88, the stop being secured to a shaft 95 provided with a finger-piece 96 cooperating with locking-notches 98. Letter spacing is regulated by a cam 87 engaging a roller 86 on the heel of the pawl 83, the cam having a hump for holding the pawl out of engagement with the ratchet-wheel during part of the stroke. By adjusting the cam, the feed can be silenced or varied from one to twenty-four teeth. The ratchet-wheel has seventy-two teeth and the maximum traverse of the type-wheel carriage is effected by three revolutions of the ratchet-wheel. When the feed is silenced the type-wheel carriage can be moved in either direction by a handwheel 43. The cam is adjusted by means of a handle 243 riding on a bar 241 and connected by a chain 240 to a worm engaging a worm-wheel 233 on the cam. A pointer 244 on the handle 243 is arranged over a scale 230 having graduations 0 - - 24 indicating the feed determined by the setting of the. pointer. Some of the graduations are associated with marks, preferably the letter H in different styles, corresponding to the style-indicating marks 151 of the type-wheels. Each style-indicating mark on the scale is placed above that one of the graduations that indicates the minimum feed required for the types corresponding to the style-indicating marks. Line-spacing mechanism. - Line-spacing is effected by a hand-wheel 20, Figs. 1 and 2, geared to a screw 14 engaging a nut 15 on the slide 7 that supports the type-wheel carriage 22. Matrix-supports; matrix clamping and guiding arrangements; carriage scales. - The table 5, Fig. 1. is provided with book-cover clamping- plates 208 pivoted on a rod 203 and depressed by springs 210, the rod being mounted on levers 204 so that the clamping-plates can accommodate book-covers of different thickness. The clamping- plates are connected by a handle 209. Scales 214 on the clamping-plates co-operate with a pointer 214<1> on the slide 7 to indicate the linespace position of the printing-head P. The bookcover is squared by pins 202. For centring the book-cover, the table is provided, in a recess between the clamping-plates, with a scale plate having a number of transverse scales which have the zero mark at the middle and are graduated upwards at each side. The back bone of the book-cover lies on the scale plate and the bookcover is adjusted to bring the sides of the back bone into register with identical graduations on the scales. A strip of cardboard is inserted between the back bone and scale plate. To aid the operator, the title may be written on successive lines of a slip of squared paper. The top line of squares is numbered so as to show by inspection the number of characters in each line of the title, and words such as "Author," " Title," &c. are printed in the margin on successive lines. Spaces are provided also for other data. The slip may be secured to the table by a clip 245. Tubular and like printing-arrangements. -To aid in centring the lines embossed on the bookcover, there is provided a rotary scale-drum 223, Figs. 1 and 2, driven from the shaft 30 by gearing 215 - - 218 and arranged to make two revolutions during the maximum letter-spacing traverse of the type-wheel carriage 22. The scale-drum is divided into circumferential columns in register with the graduations 2 - - 24 on the letter-spacing scale 230. The number of graduations in each circumferential column is equal to the maximum number of characters and word-spaces that can be accommodated in a line when the pointer 244 is set opposite the associated graduation on the scale 230. The scale-drum is arranged in a stationary transparent tube 224 having zero marks 226 which register with the zero marks of the circumferential columns when the type-wheel carriage is in mid-position. The scales are employed as follows: The type-wheel carriage is traversed by the hand-wheel 43 to the desired line-commencing position and the spacing is determined by moving the pointer into register with the circumferential column that indicates the number of characters and word-spaces in the line. The style of type indicated by the pointer, or a smaller style, is then selected and the line is printed character by character, the preliminary setting causing the line to be printed centrally. If it is desired to use a certain style of types, line-commencing position for minimum spacing is determined by traversing the carriage until the circumferential column opposite the selected style-indicating mark indicates the number of characters and word-spaces in the line, and the pointer 244. is then moved into register with the style-indicating mark; or if wider spacing is desired, the number is observed in another circumferential column and the pointer is moved into register therewith. If the length of the lina is known, line-commencing position is determined by traversing the type-wheel carriage until the