US1841356A - Textile printing machine - Google Patents

Description

Jan. 19, 1932. J. H. ANDRESEN TEXTILE PRII JTING MACHINE Filed Dec. 13, 1930 Jog Patented Jan. 19, I

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a series of printing rollers, and a,- gum roller rotating in contact with the.impressionfcylin s der. The principal object of the inventionis to provide an improved machine'of this char- A acterin-whichmeansis provided for trans-'1 i mitting motion from theimpressioncylinder to the gum rollerat a surface speedat least as great as that of the impressioncylinder, whereby a single gum roller of'acconvenient diameter may. be used in combinationxwith sets of printing rollersof ditferentdiameters without producing slippage. e

Other objects and advantages of the invention'will appear as the description proceeds." The drawing accompanying. this specification is anend view, partly broken away of a machine embodying the features' of the pres; cut-invention. a t

' Referring to the. drawing, 1 designates the frame of a textile printing machine; in which is mounted for free rotationa cylinder or impression roller 2 of comparatively large di ameter, in contact with the surface'ofwhich: the usual blanket 3 travels during its passage from guide roller 4 to guide'roller15; plu rality of printing rollers 6, anda; roller 7 are mounted in bearings carried by movable blocks 8, for rotation in V frictional contact with the surface of the impression cylinder 2,

means of suitable screw shafts 9 swiveled in the bearings 8 and threaded throughfixed portions'of the machineframe in the wellknown manner. 7 V I e p Motion is imparted to the printing rollers 6 by means ofpinions 10secu'red on theshafts of the rollers, said pinions meshingjw'ith a gear 11 mounted for rotation ona stud shaft 12, secured in the frame of the'machine, mo tion being imparted to'the gear by a pinion 12 from any suitable source of power; As is the usual practice in the operation of machines of this type, motion is imparted to the impression cylin'der'2 by frictional contact with the printing rollers 63, which, as above stated, receive motionby means of the the contact t pressure being controlled: by"

gear and 'pinion's 10;-

It is the geiieiauyfl accepted practice to providea pinion, similar i tor the pinions 10, on the "shaft of the gum f roller7, said guln roller pinion being also in. meshwith gear 1 1. However; inasmuch as the gum roller-is in frictional Contact with I 1 ithe'" impressionfcylinder; which latter 1 is driven frictional contactwith the print-E V ing' rollers, it follows that under such prac? tice the diameter "of the gum roller must always be'tlie same as'that of the'set ofprint ing'rollers with which it'is tofbe used; and

since the latter varyiconsiderably in diame ter, depending on the: designsto be printed, a I large. supply of g m rollers iofvarying diameters mustbe kept in stock, which of course is'uneconomical from the standpoint of cost I as well as thespaee they occupywhen notjin use; {The present invention is intended" to provide a combination of members whereby a single gum roller may; be used in conjnnc tion with printing rollers,of any diameter,

thereby eliminating the necessity of providing a number of gum rollers of different diameters; i *i; Tl t;

' In the machine as shown herein; the" gum roller '7 is maintained in frictional contact with the impression'eylinder,"and isynot 1 geared to the gear 11. The gumroller, how? ever, does? not depend for its "motion on this frictional Contact; "but nevertheless "receives its'fdriving motionffromlthe surfaceof the impression cylinder. 'For'this purpose aj shaft13 "is mounted "for rotation in movable bearingsgcarriedby the machine frame," said shaft fearrying a? roller 14:, in" frictional. con-" tact-with thesurface oftheimpressi'on cylin der. Assho wnherein theroller 14: engages the impression cylinder at "a portion of said instance rat-a point above the point of entry t l of the blanket between the cylindergandthefirst printing roller; Motion is thus 7 trans mitted' from theinipress'i'o'n cylinder to the roller 14, by fri'ctional contacti Theshaftfi i cu drawing.

carries at one end a sprocket 15, andon the corresponding end of the gum roller 7 is secured a similar sprocket 16, which sprockets are engaged by an endless chain 17 whereby motion is transmitted from roller 14 to the gum roller 7. The shaft bearings of the roller 14 are adjustable toward and from theimpression cylinder 2, by means of a swiveled screw 18, in the same manner as the printlng rollers and gum roller. The sprocket chain is preferably provided with atensioningmeans, shown herein as an idler'sprocket 19 over which the chain passes, the shaft of said sprocket being itself mounted in movable bearings controlled by a s'wiveled adjusting screw 20. It is of course understood thatthe expression surface of the impression cylinder as herein used is intended to mean the usual working surface of the cylinder, which may have a cloth or rubber covering.

From the foregoing it Wlll be seen that j while the gum roller 7 receives its rotary motion from the impression cyl nder, the transmiss on of such motion'is entirely 1ndependv ent'of the contact of the gum roller itself with the impression cylinder. Consequently, there is no necessity for changing the gum roller regardless of the girth of the printing or design rollers because the gum roller is always drivenat a surface speed at least equal to that of the impression cylinder, which inv turn is determined by surface contact with the printing rollers. As a matter of fact, the ratio of the sprockets15 and 16 is preferably such as to cause the gum roller to rotate at .a surface speed slightly causing the latter to be driven by frictional:

contact with the impression cylinder through the intermediary of the blanket and the fabric being printed. However, such a construction is obviously impractical, for the reasonthat here is considerable slippage of the gum roller with relation to the impression cylinder and consequently considerable puckering or piling up of the goods at the point of entry between the impressio cylinder and the gum roller.

p t is believed that the operation of the machine will be understood fromthe foregoing description, taken in connection with the Thefabric or goods to be printed is fed into the machine over a roller 21 and passes along with the blanket 3 between the successive printing rollers and the impression cylinder and between the impression cylinder and the gum roller, whence it is led out over a roller 22, in the usual manner, motion being imparted to the printing rollers by the shaft 12 through the pinion and gear connection hereinbefore described. The printing rollers, by their frictional contact, through the fabric and blanket, with the impression cylinder, transmit motion to said cylinder, which in turn transmits motionto the roller 14 which is in direct contact therewith, and which roller, through the sprocket and chain connection, positively drives the gum roller 7. It will, of course, be understood thatthem achine may be provided with as many printing rollers as may be desirable or necessary, and that other details of construction may be modified without departing from the spirit and scope of the invention asset forthjin the appended claims. V r r i laving thus described my invention, what I claim is:. v i

1. In a textile printing machine, the combination of a printing roller, means for imparting-rotary motion to said roller, an impression cylinder in. frictional contact with said printing roller and adapted to beidriven thereby, a gum roller mounted for rotation in contact with said impression cylinder, and means driven by the impression cylinder for imparting motion to said gum roller and adapted to maintain a predetermined ratio between the surface speed of the impression cylinder and that of the gum roller. 2. In ateXtile printing machine, the combination of a printingrollenmeans for im- Y parting rotary motion to said roller, an'impression cylinder in frictional contact with said printing roller and adapted to be driven thereby, 'a gum roller mounted for rotation in contact with said impression cylinder, a rotatable member in frictional contact with the impression cylinder for receiving motiontherefrom at a point distant fromsaid gum roller, and means for transmitting inotion from saidmember to said gum rollerat a surface speed at least as great as that of the impression cylinder.

3. In a textile'printing machine, the combination of .an impression cylinder, a fabric web in engagement with a portion of the surface of said cylinder, a plurality of. printing rollers in frictional engagement with said weba-nd impression cylinder, means for im parting rotary motion to-said printing rollers thereby to cause rotation of the impression cylinder, a gum roller in contact with said web andimpression cylinder, a roller in directf'ri'ctional contact-with the impression cylinder at a portion thereof betweenthe runs of said web, and means for transmitting motioii from said direct-contact roller to said gum roller at a surface speed atleast as great as that of the impression cylinder.

In testimony whereof I have signed ny name to this specification.

JOHN H. 'ANDRESEN.

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