US1167216A - Web-advancing mechanism for drying-frames. - Google Patents

Description

B. H. c. H. BATHSFELD. WEB ADVANCING MECHANISM FOR DRYING FRAMES. APP LCATON FLED CT. 30, 1913. 1,167,216Q W Patented Jan. 4,'1916.

2 SHEETS--SHEET .I.

- COLUMBIA PLANOORAPH CD..WASHINGTON, D. C.

B. H. C. H. RATHSFELD. WEB ADVANCING MECHANISM FOR DRYING FRAMS.

APPLICATION FlLED-0CT. 30.'1913.

Pateted Jan. 4, 1916.`

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CDLUMBIA PLANOGRAPH co ASHINCITON n c wrr s ra rs rarnwr EEK),

BERTI-IOLZD HEINRICH CAEL'HERMANN narnrnnn, or nonnnansnv, GERMAN?.

WEB-ADVANCING MECI-IANISM'FOR DRYING-FRAMES. I

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In the frames hitherto employed for drying webs of paper or woven fabrics hanging in long folds thesupporting bars 'carrying these folds were advanced by means of chains or by' fingers which were pivoted to reciprocating frames, or by means of cams which were rigidly secured to reciprocating rods. j

The advancing of the supporting bars, by

means of chains had the 'disadvantage, that' the bars could fall down and the;chains could break. The method of advancing the" supporting bars by means of fingers pivoted to reciprocating frames entailed too many moving and dust collecting parts above the 'support-ing bars and the material to be dried. The advancng of the supporting bars by means of cams 'rigidly secured to reciprocating rods had the disadvantage, that the cam'rod had to have a dupleX motion', one longitudinally and one around its own aXis; this necessitated a complicated journaling a' difficult lubrication and the restriction of the length of the stroke of the cam rod to the distance of the cams between each other so that this method could not beemployed at; all when the bars' were to'be arranged very close to each other. i

The new arrangement has the object of obviating these drawbaoks, by imparting to the rails carrying the supporting' bars a re-` ciprocating movement, and providing pawls on stationary rails, which pawls will 'allow of the bars passing on their forward stroke, but will retain them at the return'stroke, or,

' when disengaged, will' discontinue the advance of thematerial being dried.

The present improvement further afiords the advantage, that the attendance and lu-. brication are reduced to a minimum, so

' much the more if the rollers carrying the rails are fitted with ball bearings, and that the distance betweenthe supporting bars is determined only by the stroke of the connecting rods of the cranks reciprooating the' rai'ls, which stroke may be variable at wilL Speeificaton ofetters Patent. e Patenta@ 4 1915 Application filed October 30, 1913. Serial na. 793344.

Accordingly whether the supporting bars and with' them the paper or fabrio webs shall be moved forward only or forward and backward, a set of lpawls is provided either for the forward travel only, or for the forward travel and thebackward travel each. a Byldisengaging the p awls for the forward travel and engagng the pawls for the backward travel, for nstance, the for-` ward travel will be discontinued' and the backwardtravel. will be produced. Ifall pawls are disengaged, the travel of the Ina-` terial is entirely stopped."

The new 'possibilites for the movement of the paper webs hereby obtained are of great importance inpractice, so much the more as it is thereby rendered possible to reverse the direction of the travel or disengage the travel altogether in a very simple manner.

When the travel of? the supporting bars is stopped they will participate in the reciprocating' movement --of the supporting rails. The material being dried is thereby swung to and fro and. will dry much faster,-

than if itwer to uniformlyv travel in one direction. The travel -is, therefore, stopped when the materialis not sufficiently dried in the 'ordinary travel. i

After the material has been sufficiently dried and shall then be removedfrom'the I drying room', the `pawlsfor the advance travel can 'be disengaged and the travel be reversed. the 'supporting bars is stopped for ,producing a reciprocating movement of the ma terial being dried by disengaging the pawls, for inst anee. by lifting these pawls with the aid ,of a rod provided with cams, so that the'supporting bars on the supporting rail' The forward or'return travel of are not touched by thepawls and participate in the' reciprocatingmotion of said rail.

In order to' allow of a return travel of themateral under treatment, pawls' are prov1ded, wh1ch are arrangedn adirecton op-.

posite to that ofthe pawls for the forward movement, and also these pawls are fitted with a lifting device of` knowndesign. The

- arrangenent .must be' such, 'that either by means of' the said lifting device the pawls i can be moved into such position, that either only the pawls 'for theforward travel are in` operative position, while the p awls for the return ,travel are disengaged, or vice versa, or, that both sets of pawlsare disengaged, and the material under treatment s merely swung to' and fro. The new arrangement is shown in the accompanying drawings in which- Figure l is a. front elevation of a constructional form having only one set of pawls. Fig. 2 is a side elevation. Figs. 3 and 4 illustrate a second constructional form of the arrangenent with one set of pawls. Fig. 5 is a side elevation of the arrangement with one set of pawls each for the forward travel and for the return travel respectvely, and Fig. 6 is a detail view with the pawls on an enlarged scale.

The operation of the new improved arrangement is as follows: To the rails b, 25 carrying the supporting bars c, 0 0 0 for the material to be dried, and running on rollers a, a are rigidly secured lateral guideplates i, 71 (Figs. l and 2). The rails b, ?9 with the guide plates i, z' are reciprocated by means of connecting rods d adjustably connected to crank disk d to vary the stroke (Fig. 5). At the return stroke of the rails Z), b the bar c, which has been raised by known chain gears, is received bythe rails b, b a pawl f passing beneath the said bar c and rising behind it, so as to prevent the said bar c from moving backward (Fig. 2). At the side of the web to be' dried and at a pitch which corresponds to the'smallest distance, at which it is desired to arrange the supporting bars c, pawls g, g 9 9 'are fitted to fixed rails h, ?L (Figs. 1, 2 and 3, i). During the forward stroke of the rails b, b the supporting bars c, 0 0 0 resting on them are advanced, and pass clear beneath the pawls g, g 9 9 The pawls g, g 9 6 will then retain the bars c, 0 0 0 when the rails I), '6 are performing their return stroke. If the stroke' of the connecting rods d is increased, the supporting rods c, 0 0 0 will during the forward stroke of the rails Z), b pass beneath two or more pairs of pawls instead of one single pair, whereby the distance between the supporting bars may be varied at will. The guide plates i, 7? rigidly secured to the sides of the rails I), b and reciprocating therewith will at the same time prevent the supporting bars from being laterally displaced or from falling out.

From Figs. 3 and 4: it is evident that the pivoting point of the pawls g, 9 9 g may also be arranged beneath the supporting rails I), 6 `When a separate set of pawls is arranged, each, for the forward and the return travel respectively (Figs. 5 and 6) the pawls g 9 9 9 are provided for the advance travel of the supporting bars 0, 0 0 0 and the pawls g g g g are provided in a similar manner for the return travel. 'For disengaging the pawls 5/ 9 g g during the advance of the material under treatment, or for disengaging the pawls g 9 9 9 during the return travel of the said material, and for disengaging both sets of pawls for swinging the material to and fre, two parallel rods 7; 15 areprovided.

As shown in Fig. 6, the bar ic is connected to the fixed rail 12, by link Z and the other bar c is connected to said rail by links m. The pawls are mounted between said bars and in Fig. 5 the bar k for Operating the pawls g 9 has been partially broken away for the sake of clearness. By referring to Fig. 5, it will be seen that when the bar 10 which is carried by the links m is moved to the right, by a lever n pins which project laterally from the bar engage the pawls (1 9 and rase the latter out of the path of the supporting bars e. If the bar ic, which is supported by the links Z is moved to the left by a lever, the pawls g 9 will be swung up, as indicated in dotted lines, Fig. 6, out of the path of the bars e and the latter may be reciprocated by the rails b, b without being advanced on the latter in either direction.

I claim: r

l. In a web swinging and advancing mechanism for drying frames, the combination of carrying rails, 'web-supporting bars loosely mounted on the rails,` means for reciprocatingthe latter, pawls adapted to permit the 'supporting bars to 'move with the rails in one direction and to retain the bars during the movement of the rails in the opposite direction, and means to hold the pawls out of engagement with the bars to permit the latter to move with the rails in both directions.

2. In a web swinging and advancing mechanism for drying frames, the combination of carrying rails, web-supporting bars loosely mounted on the rails, means for reciprocating the latter, fixed rails adjacent the carrying rails, pawls pivoted on the fixed rails and adapted to permit the bars to move With the carrying rails during their forward stroke and to retain said bars during the return stroke of the carrying rails, means to hold the pawls out of engagement with the bars to permit the latter to move with the rails to impart a swinging movement to the web, and pawls on receiving ends of the carrying rails adapted to pass beneath said bars during the return stroke of said carrying rails and to advance the bars during the forward stroke.

3. In a web swinging and advancing mechanism for drying frames, the combination of carrying rails, web-supporting bars loosely mounted on the rails, means for reciprocating the latter, stationary supporting rails, two sets of pawls pivoted on the supporting rails, one set of pawls arranged to allow the bars to pass unobstructed during their forward stroke and to retain said bars during the return stroke of the carrying rals, the other set of pawls arranged to allow said bars to pass unobstructed during the return stroke and to retan said bars during the forward stroke of the carrying rals, pawls on the recevng ends ofthe carrying rails adapted to pass beneath the bars during the return stroke of said carrying rals and advance the bars during the for- 10 ward stroke, and an ndependently operable rod for each set of pawls to move the latter;il into and out of engagement with the ro s.

In testmony whereof I have affixed my signature in presence of two witnesses.

BERTHOLD HEINRICH CARL HERMANN RATHSFELD. Witnesses:

GUSTAV HUGKEN, ALFRED W. DONEGAN.

comes of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D; C. t

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