Patent GB-364619-A (GB)
Title: Improvements in presses
IPC: D06F71/34
Filed: 1930-09-01
Abstract: 364,619. Ironing-presses. UNITED STATES HOFFMAN MACHINERY CORPORATION, 105, 4th Avenue, New York, U.S.A.-(Assignees of Strobridge, W. ; 219, Lamson Street, Syracuse, New York, U.S.A.) Sept. 1, 1930, No. 26089. Convention date, Oct. 18, 1929. [Class 138 (ii).] Steam is generated within the hollow electricallyheated press head and buck, which are maintained at constant temperature by thermostatic devices, and is passed through apertures therein on to the work, and the buck is provided with means for exhausting air therefrom. The press head comprises three spaced plates 10, 11, 12, Fig. 5, of which the press plate 12 is formed with an internal upstanding continuous rib 16 spaced from its periphery and having re-entrant portions 16a, 16b, Fig. 12, between which is formed an enlargement 17 accommodating the head thermostat 19, Fig. 5. The top of the rib is grooved to accommodate an electric heating unit 21 which is held in position by the intermediate plate 11 which is secured to the press plate 12 and is formed with a rib 25 and an outer channel 26 corresponding to the rib 16 and providing a tortuous path for the steam generated between the plates 11, 12, which passes on to the work through apertures 22 bored through the rib 16. Apertures 22a, 23a are also made in baffle ribs 16c, 16d, 16e. Part of the rib adjacent the thermostatic device is broken away. Water is sprayed on to the heated walls of the chamber through a pipe 48, valve 35, Fig. 6, and atomizing devices 45 each comprising a cup-shaped member, Fig. 8, having spiral peripheral cuts 46 which extend into the bottom portion of the cup which is housed in a recess in a block 42 having a restricted passage 44 which communicates with the recess and with a conical opening 43. The pipe 48 by which the water is conveyed to the atomizer communicates with a pump chamber 47, Fig. 3, the piston 49 of which is reciprocated by a linkage 51 operated by a handle pivoted on the press head. The inlet 108 to the pump chamber leads from the discharge side of a pedal-operated pump. The buck B, Fig. 5, is provided with a similar atomizing device 31a and with a thermostat 74. The inlet 104 to the atomizer communicates through a pipe 103, Fig. 11, with the discharge side of another pedal-operated pump 96. The upper plate 64, Fig. 5, of the buck is provided with a downwardly projecting peripheral rib 72 of the same general shape as the rib in the head and the electric heating unit 75 is accommodated in a groove therein. The intermediate plate 65 is not provided with a rib and the steam outlet apertures 76 are arranged over the whole surface of the top plate of the buck instead of through the rib 72 as in the case of the press head. The buck is also provided with an outlet 89, Fig. 3, communicating with the inlet to an exhauster. A normally closed valve 82 is provided in the pipe 89 which may be opened against a spring 87 by depressing a pedal (not shown) which raises the rod 84. The same movement of the pedal also completes the circuit of the motor operating the exhauster. The thermostats communicate with expansible members such as Sylphon bellows which operate switches in the circuits of the heating elements.