US2265313A

US2265313A - Textile drier

Info

Publication number: US2265313A
Application number: US348704A
Authority: US
Inventors: Walter H Ridley
Original assignee: Riggs and Lombard Inc
Current assignee: Riggs and Lombard Inc
Priority date: 1940-07-31
Filing date: 1940-07-31
Publication date: 1941-12-09
Anticipated expiration: 1958-12-09

Description

w. H. RIDLEY TEXTILE DRIER Dec. 9, 1941.

Filed July 31, 1940 2 Sheets-Sheet l D 9 19 w. H. RIDLEY 2,265,313

TEXTILE DRIER Filed July 31, 1940 2 Sheets-Sheet 2 zwf a W x 7J Patented Dec. 9, 1941 UNITED STATES PATENT OFFICE v Walter H. Ridley,

i g 8a ration of Massachusetts Application July 31, 1940, Serial No. 348,704

Claims.

This invention relates to an improvement in textile driers and more particularly in driers of that type in which webs having a plurality of horizontally extending runs are treated.

The primary object of this invention is to provide a drier wherein the webs are dried by streams of heated air which travel at a predetermined speed in contact with both surfaces of each run of the web to remove the surface moisture therefrom, such drier preferably having means whereby the travel of the drier streams can be altered according to the texture or moisture contents of the webs, and including ducts by which each stream of heated air traveling over one surface of a web in a direction opposite to that in which the web is traveling is guided around the edges of the web so that it returns to the source of supply incontact with: the other surface of the we V A further object of this invention is to provide in a drier comprising a housing through which the web travels in horizontal runs, partitions at the side edges of the webs, which partitions are spaced from the side walls to form compartments and which together with the runs define a plurality of parallel channels open alternately at forward and rearward ends, means for setting up streams of heated air which travel forwardly in the channels open at the rearward ends and rearwardly in the channels open at the forward ends, guide chutes in the partitions through which air travelingin the channels open at the rearward ends is deflected to the channels open at the forward ends and openings in the partitions through which the air in the last named channels is guided into the compartments be- 7 ing over a roller 21-.

Chelmsford, Mass., assignor to Lombard, Inc., Lowell, Mass., at corpoa port in a partition through which air passes from one channel into a side compartment;

Figs. 6 and '1 are sectional, plan and side elevational views respectively of another embodiment of the invention; and j- Figs. 8 and 9 are views similar to Figs. 6 and 7 of still another embodiment of the invention.

The drier housing is adapted tocontain a textile web 2| arranged in a plurality of horizontal runs 22'. Tenter chain means23 of any well known type driven by a motor 24 advance the web through the housing over a plurality of rollers 25. As shown in Fig. 1 the web 2| enters the housing over a'roller 26 and leaves the hous- This is true of each of the embodiments illustrated and hence the same referencecharacters will be employed herein.

In the embodiment shown in Fi s. 1 to 5 inclusive the web 2 I' travels betweena pair 0! partitions 30 at the side edges of the web which form with the walls of the housing a pair of compartments 3|. I The partitions 30 are'associated with the tenter chain means 23 as shown in Fig. 4 and are adjustable laterally with the chains to accommodate webs of various lengths. The means for insuring such adjustment are not here shown because they are old and [well known and form no part of this invention- The horizontal runs 22 of the web coact with the partitions 30 to define a plurality of parallel,

with the exception of the upper channel, closed,

7 at the other by a roller, 25.. The upper channel tween the partitions and the side walls of the 7 view in side elevation with parts i Fig. 3 is a fragmentary perspective view illustrating the circulation of the drying air in such embodiment; V

Fig. 4 is a perspective view on a largerv scale illustrating the tenter chain by which the web is advanced and the guide chutes through which air is conducted from one horizontal channel next below;

Fig. 5 is an enlarged sectional view illustrating are a plurality of blowers created by the blowers is substantially closed at its. forward end by a bar 33. The channels obviously alternate the upper channel being open at the'forwar'd end and the adjacent channel being open at the rearward end. The bottom channel 32, however," is not only closed at the rearward end but is practically closed at the forward end.

Mounted at the rearward end of the housing or fans 35 driven by coils, 31. The air streams 35 are heated by the coils 31 andenter-those channels 32 which are open at the rearward end. The blowers are supplied withair from passages 33which are extensions of the compartments 3| and are at all times in direct communication therewith. The chamber 39 between the blowers 35 and heating coils 31 isnormallyseparated from the passages 38 by meters 36 andheatlng doors 40. Inclined walls ll direct the air stream into theportion of the titions 30. Doors 42 and 33,

housingbetween the parin the walls of the horizontal channels 32 each open at one end and, V

ports 52 and thence along compartments 54 to heating means 51 and through such means to the intake side of theblowers 55. .The ducts |:may

. here shown as heating'coils, vary in' size and rearward ends of such lower channels are formed ports46in the partitions through which the air traveling in the channels escapes into the compartments 3|. The movement of the air through each'pair of channels; is thus directly initiated ,by the blowers and continued by the blowers as they act through thepassages 38 and compartments Stupon the air passing from the V forwardlyin the 'upperchanne'l of each pairover nels, is deflected into the lower channel byducts and after flowing rearwardly' in' that channel over'the surfaces of theiruns there exposed, re-- 7 turns through ports 46, compartments 3| and passages 38 toithe blowers. Fresh air maybe admitted to the passages 38' by regulating the 1 doors 43. In the front wall 01' the housing is a port 41 which; as desired may be wholly or par-' tially uncovered to admit. fresh air'into the hous-' the top oi thejhou'sing .20' over the chamber 39 g and co'nnected thGI'GtOI iS an exhaust outlet 48 through which excess air" may escape and by 7 which any undue increase inpressureiscounter- V tacted- Suitable means 'such as dampers 49 may be provideiito control the passage oiair through the ducts45. I

blowers 35 and heating means 3'! initiatestre'ams of drying air in alternate channels 32'.As the V streams approach the ends of theseehannels they .are deflected by ducts 45 into the adjacent chan- 1 nels along.Whiizhftheyriontinue their travel back to the blowers leaving the channels through ports 46 and thence proceeding through compartments 3| and passages 38. By adjusting the dampers 49v the flow of air through the ducts 45 can be regulated as desired and if preferred the ducts.

air'must "pass. through the web from upper to i ,(lowerchannelsgf' :1 U 5 .f web to be treate'din the embodiment of .l fthe" invention illustrated inFigs. 6 and 7 is guided f; over the rollers 25 of thehousing 20 in such mangner that :two verti'cal tiers 01 parallel horizontal runs 22 are formed. [I'he'web runs between par- 7 titions 50 having ducts 5l and ports 52 which coactlwith pairs of horizontal channels 53 formed by'the runs 22 and partitions'5ll. I The ports 52 f lead to. compartments 54 formedbetween the f partitions 50 and the-walls of the housing. The t-circulation of the" drying air is controlledby/a plurality of blowers1-55 arranged at'oppositeends i 7 are arranged in pair's,'two pairs at eachend "separated horizontally bypla'tes-56.

' j 'I hechannels 53:are arranged*in pairs open at alternate ends." The air from the. blowers 55 enters the lower channel sauce an, which channels fare openat the'ends adjacentthej'blow 'erS, travels along suchchannels to the ducts 5| by which it is deflected to theupper'c-ham els of each pair, travels along those channels to the channels'through ports"; Thus the air flowing the surface, of theruns 22' exposed in such chaning 20 betweenthe partitions 30. Mounted on As the web travels through the housing the dampers '45 by which .the

also be provided with dampers similar to' the through is controlled. 7

It will be noted that the heating means 51,

efliciency, thoseassociated with the blowers which first act upon the web (at the upper right- 7 hand corner of Fig. 7. being the strongest and those associated with\the blowers which finally act upon the. web (at theupper left-hand corner of Fig.7). being thev weakest. The entry of the drying air'f'intothe various channels from;.the blowers is "through ports 58.

. Various conditioning means for regulating the temperature andmoisture content of the heating air are provided. Doors 59 may be adjusted to "mix fresh air with therair returning along the compartment 54; Exhaust outlets 62and'63 permit the escapesof air'from the drier housing.

" Doors and BI are normally closed and access to compartments of the drier.

The operation of this embodiment is similar to that of the first embodiment in that the stream of'air'set up in alternate channels is, for the most part deflected by ducts into adjacent, channels.

' and returned to theblowers through ports atthe ends'of the second channels and compartments defined by the housingwalls and. the partitions -'accurate control of the dryingoperation is atbetween which the web travels, or the ducts may be closed so that all the air must pass into the upper'channelsthrough the web. By separating. the web runs into two vertical tiers, and providing 7,

blowers and heating means foreach tier; a more tained. r v V The embodiment of. the invention shownin Figs. 8 and 9 is a further developmentof the embodiment shown in Figs. 6v and 7. As in: that embodiment the'horizontal runs 22 of'the web 2| are arranged in'two verticaltiers .in the housing "2'0 and the web travels between pairs of partitions j 10 which form with the walls oi thehousingcom "partm'ents 1|. In the partitions 10 are formed a plurality of ports-.12, one adjacent each end of each roller 25; At opposite-ends. of the housing are {mounted pairs of blowers 13 by'which air is 'introduced'into those channels. 15 formed by the runs 22 which are open at the ends of the housing adjacent the blowersrfThe pairs of blowers "are separated by plates 16 and associated with each blower at the intake side thereof is heating 55'means 1Lshovm'in-the drawings as heating coils.

The web as it passes over the rollers 25 is protected from the direct impact of the heated air byshields'lil. ..-Thelowest shield at the right end (Fig. 9) is extended to the bottom plate to close 5 which leads into that space; titions'll) near thefright end 7 that space with the compartments ll;

-' Mounted inth'ehousingbetween the two tiers" of the housing; As here' shown the blowers -55 of runs are blowers; 8| sand heatingmeans 82 one end of the space between that plate and the bottom run of the web. The corresponding shield at theleft .endhas an opening 19 vtherein Ports in the parsimilar to the blowers l3 and heating means" mentioned above;. The blowers 8| arelseparated; bya plate 83 which supportscolumns 84 havinglongitudinally concavegfacesior the purpose of directing the air into theichannels'l5 formed by rollers 25; Doors 81 and permit a regulation passage of air thereof the space connect 7 compartments I l.

the heating means 11,

which the web to be of the drying operation in any well knownmanner. Exhaust outlets 91 also assist in such regulation. The

doors

86, 88 and 88 aiford access to various compartments of the drier and are normally closed.

As the web travels through the housing the blowers 13 and 8| set up streams of air through the various channels 15- to the ports 12 to the The compartments H are in open communication through the heating means I1 and 82 with the suction sides of the blowers; Thus a circulation of drying air is set up through the various channels 15 to dry the web. It will be noted from an inspection of the drawings that through which air-passes to the blowers 13 which act upon the upper ms of the right tier, has the greatest capacity and I the heating means 11 through which air passes to the blowers 13 which act upon the upper runs of the left tier, as well as the heating means 82 associated with the blowers 8|, have the smallest capacity. Thereby the drying air which acts upon the wettest web is the warmest and the drying air which acts upon the driest web is the coolest.

In addition to setting up circulation of drying air through the channels I5, streams of air are set up in the space 92 between the-incoming web and the top plate of thehousing, the space between the lowestrun and the bottom plate and over the outgoing web; 1

It will be noted that in accordance with this invention the drying air is forced to travel longitudinally of the web through channels defined bvthe coaction of horizontal runs of the web and the partitions between which the web is advanced, air in the adjacent channels traveling in opposite directions, so hat the stream of air in contact with one face of the web moves in the same direction as that in which the web travels while the stream in contact with the other face of the web moves in a direction opposite to that in which the web travels, that the drying'air, after having lost much of its heat to the web and. having absorbed moisture therefrom, returns to the blowers through compartments formed by the partitions and the wallsof the housing so that little or no heat is transmitted to the walls of the housing, thereby insuring eflicient and economical drying,v and that, moreover, various dampers and doors are provided whereby the temperature and moisture content of the drying air is regulated and such fresh air as may be required is admitted. a

While certain embodiments of the invention have been shown-and described in detail, it will be understood that the invention is not limited to such embodiments since changes therein and since other embodiments of the invention may be made all without departing from the spirit and scope of the invention, as set'forth in the following claims.

I claim: l. A web drier comprising a housing within dried travels, guide rollers mounted in said housing for supporting the web in a plurality of horizontally extending runs superposed with respect to each other, partitions at the sides of the web and between'which the web travels, said partitions coacting with the horizontally extending runs to define a pluraliiy also in communicationwithsaid compartments, the streams in adjacent channelstraveling in opposite directions whereby the stream of drying air in contact with one face of a horizontally extending run moves in the same direction as that in which the web drying air in contact with 'run moves in a directionopposite to that 'in housing and coacting with which the web travels, ducts-connecting each of the channels into which the streams of drying air-are directly fed by the stream creating means, to an adjacent channel and ports in the partitions'connecting said last-named channelsto the compartments through which ports the. drying air enters the compartments and returns therethrough to the air stream creating means.

2. A .web drier comprising a housing-within which the web to bedried travels, guide rollers mounted in said housing for supporting the web in: a plurality of horizontally extending runs superposed with respect to each other, partitions at the sides of the web and between which the web travels, said-partitions coacting with the horizontally extending runs to define a plurality of horizontally extendingchannels, said partitions being spaced inwardly of the side walls of the such walls to define compartments, means for creating streams of drying air. in said channels, said means being also in communication with said compartments, the streams in adjacent channels traveling in opposite directions whereby the stream ofdrying perposed with respect the sides of the web and may be made of horizontally extending channels, said partifor creating streams of drying air in said channels, said means being extending run moves in that run moves in a air in. contact with one face of a horizontally thesame-direction as that in which the web travels and the stream of drying air in contact with the other face of direction opposite to that in which the. web travels, ducts connecting each of the channels into which the streams of drying air are directly fed by the stream'creating means, to an adjacent channel, dampers in said ducts by'which the flow of air is regulated and by which such flow. can bezcut off so that the air entering theadjacent channels passes through the web, and ports-inthe partitions connecting said last-named channels to the compartments through which ports the drying :a'irenters the compartments and air streamrcreating means.

returns therethrou'gh 3. A web drier comprising a housing within which the web to be dried travels, guide rollers mounted in said housing for supporting the web in a plurality of horizontally extending runs suto each other, partitions at between which the web travels, said'partitions with the horizontally extending runs horizontally extending channels, said partitions coacting being spacedinwardly of the side wallsof the housing and'coacting with such walls to define compartmentagmeans for creating streams of drying air in said channels,'said means being also in communication with saidcompartments, the streams in adjacent channels traveling in opposite directions whereby the stream of drying air in contact with one face'of a horizontally extending run moves in the same direction as that in which the web travels and the stream of drying air in contact with the other face of that run moves in a direction opposite to that in which the web travels,ducts formed in said partitions connecting each of the, channels into which the streams of drying air are directly fedby the stream creating means to ,an' adjacent channel travels and the stream of the other face of that to the to define a plurality of and ports in the partitions connecting saidlastmeans. 7 V V r 1 5. In a' web drying housing within which;the

named channels to the compartments through "which ports the drying air enters the compartments andreturns therethrough to the airstream creating means, i 4. A web drier comprising a housing within whichthe webito be dried travelsgu'ide rollers mounted-in said housing, for supporting thelweb in a pluralityof horizontally'extending runs superp'osedwith respect to each Qthen'partitions 'at the' sides of the weband between which the web tra'vels,"-said partitionscoacting with the ments, blowersbywhich streams of drying air are introduced into alternate channels, the suction sides of 7 said ,blowers being Connected to said compartments, ducts formed insaid' partitions at the inner ends of said alternate channels and connecting said channels with the ad- ,joining ends of adjacent'channels, andports in the-partitionsat the other ends, of said adjacent channels wherebystreams of air travel through said alternatephannels, are deflected by said 7 ducts to the-adjacent channels and then, travel through said adjacent; channels to the portsin horizontally extending runsto defineia plurality V of horizontally. extending channels, said pjartie I tions being spaced inwardly of the side walls of the-housing and coacting with suchlwalls to de-' fine compartments, means for creating streams of drying air in said channels; said meansbeing also in 7 communication with said compartments, "the streams in adjacent channels travelingpin oppositedirections whereby the stream of drying air :in contact with one face ofa horizontally extendingrun moves in the same direction as that in which the web travelsand thestream of drying air in contact with the-other faceof that run moves in a direction opposite to that in fwhich theweb travels, Jducts formed in said partitions connectinggeach of the channels into which the streams of drying-air are directly fed by the stream creating means to an. adjacent channel, dampers in said ducts by which the i'low be-cut off so thattheair entering the adjacent channels passesthrough the 'web,, and ports in the partitions connecting saidlast-named chan- I nels to the compartments through which ports the drying air enters the compartments and returnstherethrough to the air stream creating web to be" dried travels; guidecrollers mounted the partitions through which' they enter thebomtion sides of the blowers.

partments and return thereth'rough to the suc- J Q '7, A web drier comprising a housing within V which the web to be dried travels, guide rollers mounted in said housing for supporting the web' in a pluralityv of horizontally extending runs superposed with respect to each other and grouped in two vertical tiers arranged end to end,

partitions at the sides of the web and between which the web travels, said partitions coacting with said runs to define a plurality of horizontally extending. channels, said partitions being.

spaced inwardly of thesidewalls of the housing and coacting with the housing walls to define compartments, blowers mounted at each end of y the housing with their suctionj'sides 'incconnection with said compartments, said blowersbeing adapted to introduce streams ofldrying air into alternate channels of both vertical tiers; ducts I carried by, the partitions at the inner ends of said v channels and connecting them with the adjoiningends of adjacentgchannels, and ports in, said partitions connecting the other ends of the adjacentchannels with said compartments and in'said'housing for supporting the web in a pluwith respectto each other, partitions atthe sides oi the web and'between which theweb travels, 'gsaid "partitions coacting with the. horizontally T 7 rality" of horizontally" extending iruns superposed extending runs 'to define 'a plurality of horizontally extending channels, said partitions be'e ing spaced inwardly oi the-side walls of the housi ngand coacting with the housing walls to define compartments, blowers bywhich streamsof drying airare introduced into alternate channels,

the suction-sides of said blowers being connected to said compartments, ducts connecting the in- "her end of each said lalternate channel with one end of an adjacent channel, and ports in the channels whereby streams of air travel through said alternate channels, are deflected by said ducts to the'adjac'ent channels and thentravel through said adjacent, channels to the ports; in

the partitions fthrough which they enter the; compartmentsand return therethrough to the suction sides of the blowers.

7 6. In a web drying housing within which the webv to be dried travels, guide rollers mounted in said housing'for supporting the web in a plu- ,rality of horizontally extending runs superposed I with respect to each other, partitions at the sides of the web and between which the web travels,

'7 said partitionscoacting with the horizontally exe through which the streams of air enter the compartments and return therethrough ti0nsides of the blowers.

8.*A web drier comprising a housing within to the sucwhich the web to be dried travels, guide rollers mounted in said housing for supporting the web in a plurality ofg horizontally extending runs superposed with respect to each other,',substan -tially' vertical-partitions at the sides OfQthQ WGD and-between which the web travels, said, partitions coacting with the horizontally extending runs to define a plurality of horizontally extending channels, said partitions being spaced inwardly of the side walls of the housing and co acting with such walls to' define compartments,

means for creating streams of drying lairysaid means being 1 also in communication with said compartments, means for directing said streams of dryingair in alternate channels in the same partitions at'the other ends of said-adjacent .direction and in the remaining channels infthe -,opposite direction,';and portsin the partitions through which the drying air streams enter the compartments 7 and return air stream creating mean's.

9.'A web drier" comprising'a' housing within 7 qwhich ,the'webtoibe' dried travels, guide rollers mounted in said housing for supporting the-web in a plurality of horizontally extending ,runs'superposed with'respect' to each other, substantiallyvertical partitions at the sides of the web and between which the web travels, said partitions coacting with the horizontally extending runs to define apluralitypf horizontally extending channels, said" partitions being' spaced inwardly of tendingruns'to define a pluralityof horizontally extending channels, said partitions being spaced I inwardlyof the side walls of the housing and coacting" with the housing walls toideflne c mpartthe side walls of the housing and'coacting with suchv walls to define compartments, means for creating streams of drying air, means fordirecting said streams of drying airin alternatechanthefrethrough to the neis in the same direction and in the remaining channels in the opposite direction, said firstmentioned means comprising blowers and heating elements, the suction sides'ot the blowers being in connection with the compartments, and ports in the partitions through which the drying air enters the compartments and returns therethrough to the suction sides 01' the blowers.

10. A web drier comprising a housing within which the web to be dried travels, guide rollers mounted in said housing for supporting the web in a plurality of horizontally extending runs superposed with respect to each other and grouped in two vertical tiers arranged end to end, substantially vertical partitions at the sides of the web and between which the web travels. said 'posite directions, and ports in the partitions through which the streams of air enter the compartments and return therethrough to the suction sides of the blowers.

WALTER H. RHDLEY.