US2340720A - Pulp beater and selector - Google Patents

Description

Filed June 27, 1942 IlEzlQ.

I and circulating worm is operable.-

Patented Feb. 1, 1944 1 UNITED STATES- PATENT PULP BEATER AND SELECTOR Harold Donald Wells, Glens Falls, N. Y. Application June 21, 19 2, s r al No. 448,777 I,

Claims. (c1. 92 -22) improved The invention relates to a new and pulp beater and selector for use in paper-make ing, the object being to provide a simple and inexpensive, yet' a highly eflicient apparatus which will operate equally well for carrying out a batch process or a continuous process, whether operating on whole pulp bales, waste paper'bales, broke, etc. In carrying out the above object, a further aim is to provide a novel construction which provides pockets to collect insoluble trash and prevent it from moving repeatedly into and out of a trough-like screen in which a beating Figure 1 of theaccompanying drawing is substantially a central vertical longitudinal sectional view.

Figure 2 is a transverse-sectional view-on line 2-2 of Fig. 1.

Figure 3 view. v p

A preferred construction has beenillus'trated and will be rather specifically described with the understanding, however, that within the scope of the invention as claimed, variations may be made. f f

A tank 5 is provided, said tank being preferably of elongated form. The bottom 6 of this "tank is provided with spaced parallel ribs I on its upper-side, said ribs extending substantiallybetween opposed portions of the tank side wall.

Between these ribs, the tank bottom is provided with a substantially semi-cylindrical upwardly the length of said ribs, the channel bottom being provided with upwardly curved ends 9 which merge into similarly curved portions I 0 of the tank side wall. The major portion of the length of the channel' 8 is formed byla' substantially semi-cylindrical screen I l which may be of one piece or constructed from a plurality of screen plates. screen I! project upwardly substantially even with the upper side of the ribs 1. In the construction shown, the intermediate portion of each rib 1, co-extensive with the length of the screen ll, comprises a longitudinal wall portion I spaced outwardly from said screen II, and a longitudinal top flange I the upper edge of said walkportion 1 to the upper edge of said screen I- A beating and circulating worm I3 is disposed longitudinally in the channelv 8 in wiping relation with the screen ll, said worm having reduced ends l4 operable over the upwardly curved= ends 9 of the channel bottom. The worm I3 is is a fragmentary sectional perspective The longitudinal edge portions of this proiecting inwardly from side walls ill of the casing la, in the 'sills or the like 21.

quantity of water are obviously the supply 'of feed water could be auto trative purposes, a pulley I6 is shown'o'none end of the worm shaft; engaged by a ;plurality of a V-belts l1 appropriately driven.

- Under the screen ll, there is provided a semicylindrical casing l8 to receive the}-,pulp dis-,.

charged through said screen, said casing l8 being provided with a pulp outlet 18. The longitudinal I present disclosure, merge into the side wall "portions 7 of the ribs I. The ends of the casing l8 may .well form feet 20 to support the entire tank upon The material to be placed inlthe tank 5 and matically controlled if desired. When the worm I3 is driven, the pulp andliquid selected pulp discharges through the screen I I ing actionthereon. open trough or channel 8 extending throughout and is received in the casing i8 from whichit leaves throughthe outlet 19. -Wi th this outlet constantly open, the apparatus will effectively perform a'continuous beating andselcting oper but if" desired, the outlet could be closed ation, until the pulphas been beaten and circulated for some time -andithen opened] to permit discharge of the pulp. 'Theworm IS in either instance will act tokeep the' screen-clean by exerting a 'wip' Any trash which cannot be converted into a suiliciently fine state to pass through the screen II, will simplycollect in the two pockets 22 formed at the outer sides oi! the ribs 1, from which it may be removed from time totime. fl

F'r'om'the foregoing'taken'in connection with \the accompanying drawing, it will .be seen that tended portion novel provision has been made for carrying out the object of the invention, and attention is again invited to the possibility of making variations within the scope of the invention as claimed.

'Iclaim: 7 v

1. A pulp beater and selector comprising a'tank having an upwardly open channel in its bottom extending substantially between opposed portions "of the tank side wall, the sides of said channel being inwardly spaced from two other opposed portions of said tank side wall, the bot-' tom'of said channel having upwardly turned ends, said channel being provided with a substantially semi-cylindrical screen forming an exof its length,- circulatlng means mounted longitudinally in said channel in wiping OFFICE,

pulped and an appropriate are circulated the tank as indicated .by the arrows, performing" an eifective beating and seiecting'operatzm. The '1 relation with said screen and having portions over said upwardly turned ends of said channel bottom, means under said screen for receiving the pulp discharged therethrough, and means projecting upwardly from the tank bottom between said channel and said two other opposed portions of the tank side wall to prevent trash on the tank bottom from moving laterally into said 7 channel.

2. A pulp heater and selector comprising a tank having spaced parallel ribs on the upper side of its bottom and extending substantially between two opposed portions of the tank side wall, said ribs being spaced inwardly from two other opposed portions of said tank side wall, said tank having an upwardly open channel longitudinally between said ribs, the bottom of said channel being provided with upwardly turned ends, said channel having a substantially semi-cylindrical screen forming an extended portion of its length, a circulating worm mounted extending longitudinally in said channel in wiping relation with said screen, and means under said screen for receiving the pulp'discharged therethrough,

the portions of the tank between the outer sides of said ribs and said two other opposed portions of the tank side wall constituting trash-collecting pockets.

3. A pulp beater and selector comprising a tank having spaced parallel ribs on the upper side of its bottom and extending substantially between two opposed portions of the tank side wall, said tions of the tank between the outer sides of said ribs and said two other opposed portions of the tank side wall constituting trash-collecting pockets.

stituting trash-collecting pockets.

5. A pulp beater and selector comprising an elongated tank having parallel side walls, parallel end walls and a bottom, said bottom having two laterally spaced longitudinal ribs extending from one of said end walls to the other, said ribs being disposed'between said side walls and the longitudinal center of the tank and projecting upwardly from said bottom, whereby said ribs cooperate with the lower portions of said side and end walls and with the portions of said bottom between said side walls and ribs in forming trash-collecting pockets, the central longitudinal portion of said bottom being depressed between said ribs, the bottom of said ribs and constituting a semi-cylindrical trough which extends longitudinally from one of said end walls to the other and extends transversely from one of said ribs to the other, the ends of said trough being turned upwardly to said end walls and the major intermediate portion of said trough being perforated and constituting a selector screen, the intermediate portions of said ribs co-extensive with the length of said screen each comprising a longitudinal wall portion spaced outwardly from said screen, and a longitudinal top flange projecting inwardly from the upper edge of this wall portion to the upper edge of said screen, a screened pulp-receiving casing secured to said tank bottom under said screen and having side walls merging into said side wall portions of said ribs, and a circulating worm mounted longitudinally in said trough and hav-* ing reduced ends within said upwardly curved ends of said channel.

HAROLD DONALD WELLS.

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