Patent GB-1381911-A (GB)
Title: Card embossing apparatus
IPC: B41J3/38
Filed: 1972-03-22
Abstract: 1381911 Selective embossing DYMO INDUSTRIES Inc 22 March 1972 [25 March 1971] 13466/72 Heading B6F Card embossing apparatus comprises a type wheel 170, Fig. 22, having a plurality of symbol embossing dies 218, 220 positionable at an embossing station by rotation of the-wheel 170, a card holder 91, Fig. 6, for positioning a card 93 to be embossed in registration with the embossing station, and means for moving the card with respect to the embossing station for sequentially embossing symbols on the card. Type selecting; aligning for impression; keyboards.-The type wheel 170 is coupled to a continuously driven shaft 161, Fig. 22, and may be arrested at a selected position by depression of a key 228 whereby a stop 238, Fig. 19, is placed in the path of a stop bar 222 carried by the type wheel 170. A plate 232 locks the key 228 in depressed position. When the type wheel has been arrested, shafts 161 and 168 continue to rotate, cams (186, 200, Fig. 25, not shown) on hub 198 of wheel 170 and a spool 182 on shaft 168 respectively act to urge the spool 182 downwardly, thereby pivoting a bellorank 256 to engage a clutch 246 whereby the drive from shaft 161 is coupled to a cam group 244. On initial rotation of the cam group 244, a wedge (242, Figs. 1, 18, not shown) locks and aligns the type wheel, and a bar 278, Fig. 19, is displaced to release the depressed key 228 by displacing plate 232. Embossing hammer mechanism.-Further rotation of the cam group 244 acts firstly to lower a back-up anvil 302, Fig. 22, into engagement with female die 218 through cam 288, and secondly to drive a hammer 330 through toggle action (Figs. 20, 21, not shown) from cam 306. Letter spacing.-After embossing, the card 93 is stepped into position for a subsequent character by displacement of a carriage 46, Figs. 6, 9, on guide rods 50, Fig. 6, by escapement mechanism 34, Fig. 9. A face cam 340, Fig. 22, of cam group 244 acts on a lever 344 which is coupled to an escapement pawl 390, Fig. 9, through a spring 398. On displacement of the pawl 390, a feed pawl 368 or 370 is disengaged from a respective rack 374 or 376 respectively, a projection 393 on escaparaent pawl 390 engaging rack 374. The feed pawl 368 or 370 then returns into engagement with its rack, the carriage having been displaced one letter space by a spring 423, Fig. 6. The racks 374, 376 are of different pitch, the operative pawl being selected by a projection 366 on a bellcrank 362, displaceable through a slide bar 358 coupled to a selector knob (356, Fig. 1, not shown). Carriage release.-A lever 404 may be pivoted to release the pawls 368 and 370 from their respective racks by a flange 418. Line spacing.-A carriage 48, Fig. 6, mounted on carriage 46, may be displaced for line spacing, A lever 424 operates escapement pawls 430, 438 acting with a rack 446 to cause displacement of carriage 48 by a spring 456.  Carriage stops.-A margin stop 462, Fig. 6 is provided to limit the travel of carriage 46, and comprises a tab 472 engaging notches in a bar 464, coacting with a guide rod 52 for carriage 48. Travel of carriage 48 is limited by a projection 452 on rack 446 engaging a stop 454. Card holders.-A card 93, Fig. 6, is held on the carriage 48 by fingers 112 which act against a plate 98. In order to insert the card, the carriage 48 is moved leftwardly in Fig. 6 by rotating a shaft 56 which carries sprockets (58, Fig. 1) meshing with fixed racks (60). When the carriage reaches its rearmost position, the fingers 112 and float plate 98 are pivoted upwardly by cam action and pressure on the card 93 is reduced so that the card can be removed and another inserted.  Back-spacing.-The carriage 46 may be backspaced by depression of a key (600, Fig. 2, not shown) whereby a roller (610, Figs. 26-28, not shown) is urged into contact with a pivotable and slidable arm (612) which carries a rubber pad (620) for engagement with teeth (622) on the undersurface of the carriage 46. Engagement of the roller with the arm urges the carriage to step in reverse direction one letter space.