Patent GB-190320582-A (GB)
Title: Improvements relating to Devices for Embossing Words or the like upon Pliable Strips or Plates and to the Manufacture of Dies for the Embossing of Notepaper and the like.
Inventor: HAWKINS THOMAS
Filed: 1903-09-21
Granted: 1904-09-24
Abstract: 20,582. Hawkins, T. Sept. 24. Stamping; making dies.-Relates to means for embossing words and the like on pliable metal or other sheets or strips, and to the manufacture of dies for embossing paper &c. and comprises a machine of the kind described in Specification No. 17,505, A.D. 1902. Fig. 1 is a plan of a machine, in which the dies h are secured by screws j in a recess in the periphery of a disc f pivoted on a central pin which is secured to a plate b screwed to a wooden base a. The periphery of the disc f is formed with conical recesses between each pair of dies, in which a spring pin q engages to hold the disc when the operating- lever o is lowered to depress the upper die. The lever o is pivoted on a pin in the bridge k secured to the base by bolts l, and is held in its normal raised position by the extended portion s engaging a spring t, which also withdraws the pin q from the conical recesses. The disc f is provided with a dial revolving beneath a stationary pointer 13, which indicates the particular die in position for embossing. A view of one of the dies h is shown in Fig. 3<a>. The die-blocks 30, 31 are mounted radially on projecting tongues 32, 33 suitably connected at the inner end by a block 34, pin 35, and screw 36 The male die 31 may be adjusted to perfect registration with the female die 30 by means of screws 37. The male dies may be secured directly to the disc f if desired. The disc f is rotated by hand and the strip or plate w to be embossed is secured by clamps x and flexible connections z to sliding blocks y which are fixed to a sliding bar 1 by clamps 2. The bar 1 slides in guides 3 fixed to a plate or carrier 4 capable of being moved backwards and forwards on the plate b for embossing two or more lines of characters and clamped in any position by a screw 5. One edge of the bar 1 is provided with a rack 9 gearing with a pinion 7 operated by a wheel 8 by means of which the strip w is fed forwards. A spring detent 10 engages in teeth 12 on the feed-bar 1, formed as small as possible to permit of fine adjustment to suit letters of different widths. For embossing curved lines of characters, the metal plate or strip is suitably pierced and mounted by means of two small dowels 17 on a small pinion 14 gearing with a rack 16 on one side of the bar 1. Dies for embossing note paper &c. may be formed from strips embossed on the machine described, the mixle and female dies being either embossed together or separately. In the latter case, the machine is fitted with an indicator to ensure perfect registration of the two dies. A strip of paper or other material 51 ruled with transverse lines is fixed to the fixed bar 1, and an arm 52 provided with a point 54 is pivoted to the bracket 3, which when depressed forms a minute hole in the paper. The slip of paper thus perforated during the embossing of the first strip is used as an indicator for forming the second. The arm 52 may be swung over to the other edge or the bar 1 held by a dowel 56 for registering additional lines of embossing. The dies may be formed from a single plate doubled in half and embossed in one operation, the joint forming a spring hinge. Another method of forming dies consists in simultaneously embossing a thin brass plate 79 and a copper plate 80, Fig. 13. The brass plate 79 and another similar plain brass plate, Fig. 14, are then embossed together. The raised surface of the copper plate 80 is then removed by filing or otherwise, and the plate used as a backing for the plate 79 as shown in Fig. 13, thus forming the female die. The recesses in the back of the second brass plate are filled with glue or solder and, after the working-face of the projections have been filed flat, the plate forms the male die. Additional backing-plates 83 may be provided if desired. In the Provisional Specification, an alternative method of operating the feedbar 1 in the machine shown in Fig. 1 by means of pawls is described. The Provisional Specification also states that, instead of the registering- device above described, a disc attached to a pinion gearing with a rack on the feed-bar and rotating beneath an arm carrying a perforating-pin may be used.