US2347109A

US2347109A - Leather drier

Info

Publication number: US2347109A
Application number: US428943A
Authority: US
Inventors: Alpheus O Hurxthal
Original assignee: Proctor and Schwartz Inc
Current assignee: Proctor and Schwartz Inc
Priority date: 1942-01-30
Filing date: 1942-01-30
Publication date: 1944-04-18
Anticipated expiration: 1961-04-18

Description

A. O. HURXTHAL LEATHER DRIE R 8 Sheets-Shetl Filed Jan. 30, 1942 ffya.

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APll .18, 1944- A. o. HURXTHAL. 2,347,109

LEATHER DRIER vFiled Jan. 30, 1942 2 Sheets-Sheet 2 Patented Apr. 18, 1944 UNITED STATES PATENT OFFICE LEATHER DRIER .Application January so', 19.42,*seria1 No. 428,943

(c1. sli-s) 3 Claims.

vThis invention relatesto an apparatus'for drying hides or otheratunits of leather, etc., with the units mounted on frames hung from overhead trolleys or supported lfrom below on suitable trucks; wherein the frames are of either a foraminous or an imperforate nature; and wherein the units are toggled, tacked, pasted or otherwise secured to the rames'in a smooth, hat condition.

The object ofthe vpresent invention is to provide a drier of the tunnel type for drying the units on the frames above noted; wherein the tunnel is divided into a plurality oi narrow, parallel channels alternating with a plurality of air chambers respectively coextensive with the channels; and wherein side walls, common to both the channels and the chambers lying adjacent to each other, are each provided with a multiplicity of perforations extending over substantially the entire area thereof, to aiord a like number of relatively spaced jets of air arranged to impinge against the materials on the frames When the frames are passed into or through the respective channels.

lThe advantages of the arrangement above described reside inthe air jets, by impinging upon such a large number ofrelatively spaced areas of each unit simultaneously, collectively eiiecting rapid uniform drying of each unit as a Whole, in a minimum amount or time; whereby the length of the tunnels,` and consequently the .amount of floor space required for a drier of any given hourly capacity, will be reduced to a minimum; .and whereby the application of the units to the frames, the drying of the units `on theirames, the strippingoi dried units from the frames, and the preparation of the frames and the wet .units for application to the frames, may becarried on `as a continuous process, for which purpose lthe iranie-v carrying rails of the separate channels are all connected to a system of trackage including at least one section located outside the drier on which the frames are run, after the units thereon have been dried, to be stripped and serviced to receive other units preparatory to reentering the drier.

In the accompanying drawings:

Fig. 1 is a diagrammatic plan view of the drier;

Fig. 2 is a longitudinal sectional elevation taken on the line 2-2, Fig. l; and

Fig. 3 is a transverse sectional elevation taken on the line 3 3, Fig. 1.

As shown in Figs. l and 3, the drier casing I is divided, by a longitudinal vertical partition 2 into a tunnel section 3 and a circulating section 4, with the bottom edge 5 of the partition 2 spaced Cil lll

above the floor a, vto '.provide :a passageway 'l between `rthe .drying :and `circulating chambers .at the lower :part oftthedrier.

The partition `2, in vthe Lipper ipart of theidryer, is provided with a plurality of circular passages 8, 8, in each of whichis rotatably mounted ia high-speedairimpeller, in the form of la disc fan 9. y

Each ian ,9 is driven byan individualmotor H.- locatedoutside.thedryer.casing i, in the .present instance, althoughany suitable means maybe providedfor the purpose.

The tunnel section .3 is divided .into .a .topl air distributing ,chamber I.Ia ,dr-ying chamber l2, and Aanair return chamber, I3.

The drying chamber i2 .is composed .of Vaplui rality of parallel longitudinal channels It, Iii, which alternate, transverselyof the drier, with air chambers i5, I5, having.relativelywide flaring mouths I5 attheir `upperends rcommunicating with the superposed air distributing chamber 'i l.

The side walls I'I, II `of the 'air chambers I5,4 I`5 converge downwardly andare joined at their lower lends by horizontal walls it, i3. These side walls I 'I, I'I are vcornmonto both the air cham-bers I5'and the drying channels Lifi, iid-and are perforated over substantially their entire areas, as indicated-at I9, t9, to provide a multi-- plicity of nozzle-'like openings'throughwhich relatively spaced jetsof air 'are projected in opposite directions into each channel Ill, from. top 'to bottom and from end toend thereof. v

The flaring mouths I6 of the air chambers i5 are formed by angularly arranged top walls 2li, 2%, under the peak of each is hung a rail 2I of inverted T cross section, for reception of

wheels

22, 22 vof the trolleys l23, 23 supporting the

frames

25, 25 yon which the skinsyhides, or other leather units are mounted.

ln the air circulating chamber 4 of the drier are the usual air conditioning elements 24, such as pipe coils, honeycomb radiators, etc., through which the air, returning from the bottom of the drying chamber I2, through the return chamber I3 and circulating chamber 4, passes to the distributing chamber II, under impetus of the impellers 9.

In the distributing chamber I I is a plurality of spaced longitudinally extending segmental

air distributing veins

26, 26, by Which the air traveling horizontally across the top distributing chamber II is divided and directed downwardly into the wide mouths I6 of the various channelside air chambers I5.

The operation of the drier will be clear from the foregoing description of the structure. Cross-circulation of air is set up by the fans 9, which builds up a pressure of air in the side chambers I5. rl'his air pressure passes from these chambers I5 as a multiplicity of spaced air jets distributed uniformly over each common side Wall II to impinge against relatively small adjacent areas of the frames 215, and the leather units carried thereby, as the frames are passed into and through the channels I4, I4, either intermittently or continuously, as a train.

As shown in Fig. 1, the various rails 2|, 2| in the channels I4, I4, respectively, arepconnected, by suitable monorail switches 21, 2'I to cross

end rails

28, 28, which, in turn, are connected to a single outside rail 29, along which stripping, preparing, and reloading of the

frames

25, 25 are effected.

I claim:

l. A tunnel drier for leather and like units, formed with a plurality of longitudinally elongated vertical closed top channels in parallel side by side relation and a plurality of open top coextensive air chambers intermediate and laterally adjacent said channels in alternating relation thereto and with a distributing chamber above said alternating chambers and channels in constant direct communication with all of said open top chambers, said drier comprising perforated side Walls common to immediately adjacent channels and chambers, top walls respectively closing said channels against direct communication with said distributing chamber, said top Walls being connected to said perforated side walls and therewith defining said channels and chambers respectively, means for producing air pressure in said chambers to escape through the perforations in said common side Walls into said channels as a multiplicity of air jets directed in opposite directions toward the central vertical planes of the respective channels, a series of ilat expansive unit-supporting frames adapted to pass through said channels from end to end thereof substantially coincident with the central planes of the respective channels in intersecting relation to said oppositely directed air jets, and a supporting rail for said frames extending longitudinally throughout the length of each channel.

2. A tunnel drier for leather and like units, formed with a plurality of longitudinally elongated vertical closed top channels in parallel side by side relation and a plurality of open top, coextensive air chambers intermediate and laterally adjacent said channels in alternating relation thereto and with a distributing chamber above said alternating chambers and channels in constant direct communication with all of said open top chambers, said drier comprising perforated side walls common to immediately adjacent channels and chambers, top Walls respectively closing said channels against direct communication with said distributing chamber,

said top Walls being connected to said perforated side walls and therewith defining said channels and chambers respectively, means for producing air pressure in said chambers to escape through the perforations in said common side Walls into said channels as a multiplicity of air jets directed in opposite directions toward the central vertical planes of the respective channels, a series of fiat expansive unit-supporting frames adapted to pass through said channels from end to end thereof substantially coincident with the central planes of the respective channels in intersecting relation to said oppositely directed air jets and a supporting rail for said frames extending longitudinally throughout the length of each channel, each of said intermediate chambers serving a pair of channels respectively disposed at opposite sides thereof.

3. A tunnel drier for leather and like units, formed with a plurality of longitudinally elongated vertical closed top channels in parallel side by side relation and a plurality of open top, coextensive air chambers intermediate and laterally adjacentl said channels in alternating relation thereto and with a distributing chamber above said alternating chambers and channels in constant direct communication with all of said open top chambers, said drier comprising perforated side walls common to immediately adjacent channels and chambers, top walls respectively closing said channels against directA communication With said distributing chamber,l

said top Walls being connected to said perforated side walls and therewith dening said channelsv and chambers respectively, means for producing air pressure in said chambers to escape through the perforations in said common side walls into said channels as a multiplicity of air jets directed in opposite directions toward the central vertical planes of the respective channels, a series of nat expansive unit-supporting frames adapted to pass through said channels from end to end theerof substantially coincident with the central planes of the respective channels in intersecting relation to said oppositely directed air jets, supporting rails for said frames in the tops of said channels respectively and extending completely through the respective channels and connected to a pair of transversely extending rails beyond the opposite ends of the drier, and a rail connecting said transverse rails and located outside the drier.

ALPHEUS O. HURXI'HAL.