US1782273A - Press - Google Patents

Description

Nov. 18, 1930. o, EMA N 1,78 2,273

PRESS Filed Sept. 11. 1928 35 ln t e eppende Patentecl Nov. 18, 1930 i or'ro' mmsen n, or WELLINGSBUTTEL; GERMANYfi v PBESS Application fiied september 11, 1928, Serial no; 305324, and ifi German ::mix 22 The present invention relates to an im-' proved poWer -driven press for expressing uice Or fluid from. compressible substances of vegetable' origin such as are-employed in 'the Production of starch, but the press may also be employed to edvantage for expressing oil. from Seeds, nuts and other oleaginous substances 'and for draining peat and the like.

More particularly the invention relates to m presses of that kind Which consist of a cylinder in connection with a feed hopper and a perforated tapered discherge channel at the exit end of the cylinder, the piston or plunger reciprocatin inside the cylinder be- 15 ing drivennbya cran mechanism.

In presses of this kind the piston Or plunger at the termination of the working stroke of the Crank mechanism is reciprocated i. e. changed in its direction of motion without delay, so that the maximum pressure is exerted only momentarily, the reaction of the substance under treatment tending to force the piston or plunger back.

. According to the present invention the efficiency of such presses is materially increased by meintaining the maximum pressure and even aumenting said pressure at the termination othe working stroke of the Crank mechenism.

With this end in view the invention c0nsists in the novel combination, arrangement and edeptation of parts., all as more fully hereinafter described, shown in the accompan ingdrawin and then specifically set out claims.

In the drawings Fig. 1 is a, diagremmatic side elevation partly in Vertical section, of the improved press with the Crank mechanism for recipro- 40 eating the piston or plunger.

Fig. 2 is a partial horizontal section of the piston or plunger of the press With the tran-k meohanism for reciproceting same in the position it assuxnes et the termination of the 48 working stroke.

Eig 3 is a partial horizont'el t on o piston Or plunger of the press jw ththe "c mechanism for reciprocating'sine inthe pbsitionit assumes at the moment'iofifehhnging the direction of' motion' of the' fpiston jor plunger When' the completed.

The horizontal or slightlyinclined*Cy1inder a of the press is in connection With the feed hopper Z and With the perforated tapered working* stroke of 1sam'ejis discharge Channel 0, which is closedlaitsj free extremity by means ofnloscillatory suspended lid 0 The piston' or plunger Li reoipfpca i g riside the cylinder a serves for' acfingupo the substance supplied to the cylinder by tvey of the feed'hopper b, the piston or plnnger ;forcibly pushing said substance towards nd into the perforated' tepered' discharge' hannelc.

The pston or plun er dis reciproceted by means of an improve cra'nk mec'hanism. :'In-

stead of a pitman rod linkin the'piston O r plunger positively to the crarfa-"looseconnection of special construction s provided. The piston or set of 'push' bars and f spaced'aprt 'disp r d rrs e ne larly in regard to' its' directionjfof mtionje,

tance'in -e'xcess to that of .thestroke offtlie piston or plunger andrigidly connected together 'by means of the stay bolts and' h,;at

or near their extr'emities. It jis z dviseblegto emloy two sets of push jbars e. fleach .ferming a rigid frame in' symmetricalfi arrangement at both sides of thelon'gitudin'al axis of the piston or Fig.2. n

v The space enclosed. betwee' i the' push bars e and f and their stay bolts' n d sres for .accommodating the Crank-'she versely in regal-d to the 'cylinde the shaft z' in'symmetricalflrr tw'o 'Crank arms j, each roiid roller IC at its e'xtremity a p against the push bars e, e and [J I pIunger-;es.'indicatednin v tion the piston Or plunger d retains its position when the cylinder a is charged from the hopper b; at the termination of its working stroke, however, the piston or plunger does not retain its position owing to the reaction of the substance under pressure tending to force the piston back. This is disadvantageous because it decreases the working effect of the press.

To Obtain the highest working effect of the press by maintaining the maximum pressure and even augmenting said pressure of the piston at the termination of the working stroke of the Crank mechanism, a cam l is fixed to the piston d between the push bars e, said cam being formed with a circular race for an auxiliary roller m which is carried by the secondary Crank arms n, as shown in Fig; 3.

he circular race of the cam Z is fixed ecce'ntric in regard to the Crank shaft i and the 'roller m follows the rollers k at such a distance that it starts acting when the rollers k lFrave completed their action, as indicated in When the Crank shaft Z' continues its rotation in the direction of the arrow, the roller m acts against the circular race of the Cam Z. Owing to the eccentricity of the circular race the cam l and with it the piston or plunger d are pushed forward some distance indicated in Fig. 1 by the dotted line parallel in regard to the circular race of the cam. This su'pplementary actuation of the piston Or plunger obtains and maintains the maximum Pressure until the moment the piston or plunger starts its return journey for recharging the cylinder a.

lt must be observed here, that the reduction in Volume of the substance under pressure due-"to the expression of the liquid therefrom naturally diminishes the action of the press if the piston or pluuger is only held stationary in the position it a-ssumes at the termination of the working stroke of the Crank mechanism.

.The return journey of the piston or plunger (Z for recharging the cylinder a is started when the roller m has completed its travel along the circular race of the cam l. In Fig.

'1 the dotted circles m indicate the relative positions of the; rollers k and m, at the moment when the roller m is about to disengage from the cam Z and when the rollers k are about to contact with the push bars f. ln

Guide rails 0 on the bed plate p of the press l are engaged by the feet of the push bars e and f so as to rectilineally guide the latter in their to and fro motion.

The liquid expressed from the substance charged into the cylinder a escapes through the perforations in the circumferential wall of the discharge channel c and through the perforations in the head of the hollow pisto'n or plunger d, arrows indicating in Fig. 1 the course of the liquid through the hollow piston or plunger and along inclined gutters q, 7' below the cylinder a which receive the liquid from the latter at the rear end of same. The gutter q moves to and fro with the-piston or plunger d, being attached thereto; the gutter T is fixed in the base 8 of the press below the gutter q. The liquid is discharged from'the gutter 7' into a receiver t which is in connection with the perforated discharge channel 0 of the cylinder a as shown in Fig. 1, a conduit u leadin the liquid from the receiver t to its place o des-' tination.

The compressed substance after leaving the cylinder a: reaches the perforated discharge channel a collecting therein and filling same until it opens the lid 0 and finds its way Out.

While I have shown in the accompanying drawing the preferred form of my invention, it will be understood 'that I do not limit myself to the precise form shown, for many of the details may be changed in form Or position without afi'ecting the operativeness or utility of my invention, and I therefore reserve the right to make all such modifications as are included within the scope of the following claims, Or of mechanical equivalents to the structure set forth.

What I do claim as my invention and desire to secure by Letters *Patent is:

1. An apparatus for expressing juice Or fluid from compressible substances, comprising a cylinder, a feed hopper communicating with said cylinder, a perforated, tapered discharge channel at one end of the cylinfi der, a piston in said cylinder, an open frame carried by the piston outside the cylinder, a rigidly supported shaft passing through the Opening in said frame, a Crank on said shaft co-operating with the frame members"- for reciprocating the piston within the cylnder, a cam element carried by said rame between the shaft and the piston, and an adv ditional Crank on the shaft adapted to engage said cam element so as to support the pisten against the reaction of the compressed materials after the first Crank has passed its dead centre position.

2. A structure as claimed in claim 1 wherein the cam element is adapted to remain in engagement With the additional Crank until the first Crank s ready to retract the piston, said cam element'bein eccentric relative to the shaft and adapte to effect a gradual advence of the piston.

In witness whereof I have hereunto Signed my name this 28th da of August 1928.

TTO RIEMANN.

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