Patent GB-451491-A (GB)
Title: Improvements in and relating to laundry listing machines
IPC: B41K3/42
Filed: 1936-04-01
Abstract: 451,491. Typewriters &c. LANG, G. H., 280, Dover Street, Boston, New York, U.S.A. April 1, 1936, No. 9639. Convention date, April 2, 1935. [Class 100 (iv)] Index type-wheel machines ; aligning for impression.-In machines comprising settable type-wheels for printing on a laundry list the number of articles of each kind, and type-plates, automatically set by the type-wheels for printing the names of the articles, each typeplate is released by setting the corresponding type-wheel and is moved into printing position by means of a spring. In the machine shown in Figs. 2 and 8, a set of numeral-type wheels 3, one for each class of articles, for instance shirts, collars, &c., is mounted on a shaft 4 in a stationary head 6, each type-wheel being provided with a ratchet-wheel 10 co-operatiiig with a setting-pawl 13 which is loosely mounted on a rod 14 and is provided with a key 18 bearing the name of the appropriate article. One or more depressions of any key imparts one or more step-movements to the associated type-wheel to bring the selected type into printing position. The type-wheels can be stepped backwards, to correct erroneous settings, by manipulating the keys. Type-plates 9 for printing the names of the articles are detachably mounted on pivoted carriers 21 and are arranged in the same planes as the type-wheels. The carriers 21 are normally held in retracted position by means of latches 23 which engage pins 25 on the carriers and abut on the pawls 13. Each latch is provided with a spring 27 which abuts on a pin 28 on the associated carrier, the end 30 of the spring passing through a slot 29 in the latch and serving to hold the latch on a pivot-rod 24. On depression of the keys 18, the type-wheels are set in correspondence with the number of articles in each lot, and the carriers are released and are swung rearwards by means of the springs 27 to bring the type-plates into printing position. A rod 36 limits movement of the carriers. The list is placed on a platen 37 which is raised, as described below, to effect impression from the type-wheels and type-plates. Aligning-pawls 58, co-operating with the ratchet-wheels 10, are locked during impression by means of a spring-urged bar 61 which is mounted on trunnions 62 and has an arm provided with a pin 64 co-operating with a latch 66. When the platen is raised, a pin 69 on the platenshaft 39 releases the latch, and the bar 61 is raised to lock the pawls. For restoring the type-wheels and type-carriers, the shaft 4 is rotatable and is provided with projections 74 for engaging lugs 75 on the ratchet-wheels 10, and a cam 88 for rocking an arm 90 in connection with a blade 92 overlying the tails 94 of the type-carriers. The shaft is rotated by means of a crank 78 having lost-motion engagement with a sector 80 gearing with a pinion 83 on the shaft. The normal position of the type-wheels is determined by engagement of projections 76 thereon with a rib 77. During lost-motion of the crank, a cam-face thereon depresses the bar 61 and causes the pin 64 to re-engage the latch 66. An ink ribbon 48, arranged below the type-wheels, passes from a spool 49 to a winding-spool 52 geared to a pinion 96 co-operating with a sliding pawl 98 which is operated by a pin 103 on the crank 78. Types.-The type-plates 9, Fig. 2, preferably consists of a channel-member adapted to be slipped over the carrier 21 and to be secured by a wire spring which engages a slot in the member and urges a cross-pin thereon into engagement with a wedge 107 formed on the carrier. Platen-impression arrangements.-The platen 37 is supported by adjusting-screws 47 on an arm 38 secured to a shaft 39. A crank 44 for operating the platen rocks arms 41 provided with rollers 42 co-operating with cam-faces formed on the platen and so arranged that the rollers raise the platen and afterwards maintain pressure thereon.