US1118823A - Sheet-feeding mechanism for paper. - Google Patents

Description

G. SPIESS. SHEET FEEDING MECHANISM FOR PAPER.

APPLICATION IILED MAILZI, 1914.

Patented Nov. 24., 1914.

17212872207 Georgy ,S z Jew rangement is as a rule .been proposed .a toothed rack which UNITED STATES SHEET-FEEDING MECHANISM FOR PAPER.

Specification of Letters intent.

Patented Nov. 24, 1914..

Application filcd March 21, 1914'. Serial No. 826,450.

To all whom it may concern:

Be it known that I, Gnonc SPIESS, a subject of the Emperor of Germany, resid ng in Leipzig-Reudnitz, Germany, have invented certain new and useful Improve merits in Sheet-Feeding Mechanism for Taper and the like, of which the following is a specification. I i

In the usual sheet feeding mechanism, that is to say, in the machines in which individual paper sheets are featheredout and separated and fed forward from a p le of sheets by combing wheels a particular arprovided for the purpose of throwing the combing Wheels out of action while anothet device is usually arranged for actuating the roll by which the pile of paper sheets is advanced to the combing wheels. oth these movements are effected in a certain relation one to the 0 her and the throw-out mechanism for the combing wheels must be i'el'eased at the instant in which a sheet in advancing with its forward edge between the transfer roller's is caused to actuate What is generallycalled a detector or trip lever. The slightest force of the paper edge even of a very thin sheet must suffice to bring about the throw-out action. In such mechanical paper feeders the detector-is generally arranged on a rocker arm which is pivoted at some convenient point and carries or operates a separate pawl employed to bring about the release of the throwout mechanism. For instance, in somer'cases it has to use such a trip, lever operated by the paper sheet and a pawl moved by this action into engagement with a in tary toothed drivingmembcr whereby the pawl is then actuated to release a' throw-out mechanism for the,combing Wheels, I It has, moreover, been suggestedto employ in the place of a toothed rotary driving member is arrested by a looking pawl when the, trip lever is raised by the sheet and thereby is caused temporarily to suspend the reciprocatory movement of a carriage provided with sheet feeding claws without raising the latter Further, in machines of this kind it has been proposedto transmit movement from the driving shaft to the pile feeding roller from the sheets.

while the sheet-feeding or combing wheels are out of action.

Now according to this invention the pawl which is actuated by the rocker arm when the detector is tripped up by the sheet is caused to engage with a toothed rack which yieldinglv arranged on a moving member or rod so as to be capable of moving relatively thereto at the instant at which it engages with the locking pawl. This dis placement of the rack moves the locking pawl which thereby releases the throw-out mechanism for the combing wheels. The locking pawl by entering thetooth'ed rack arrests the forward movement imparted to r the rank by its carrier or moving member, and as the latter continues its movement -the rack is caused to he moved relatively thereto until an abutment arranged on the 'rod abuts against the rack, thereby limiting the extent of the rack movement on the rod and at the same time arresting the forward movement of the latter.

be moving member or rack carrier is actuated from a crank disk or the like whereby at certain periods it is moved only in one or rearward direction derived from which is also the movement of the sheet simply roller which advances the paper pile, whereas the opposite or forward movement of the rack carrier is due to the agency of a traction spring and is limited by the engagement of the rack with the abutment as above referred to, to an extent which predetermines the su sequent backward throw of the rack carrier and consequently the cxtcntot rotation of the sheet supply roller, so that the feed movement of the paper pile is brou 'ht into a definite relation to the food an to the throw-out movement of the combing wheels, as will hereinafterbe more fully explained. he in've'n'tion 4 Y example 1n the whiclr- Figure I shows diagrammatically a sheet feeding mechanisin of this kind in its normal or sheet feeding position, and Fig. 2 shows the same r'ncclianism in the position in w rich the combing wheels have been raised from the feed table and the rack has been displaced relatively to its carrier.

is illustrated by way of accompanying drawings, in

gag

" In the construction shown, each combingwheel a. 1s secured in a known manner to a in which the pins "70 is operated rocking lever b. This lever is capable of being raised or lowered by meansof a bell crank lever 0. The forward end at of vthe lever c is supported ina known manner upon a sliding bolt f tending under the action of a spring gconstantly-to rise to its highest position in which the combing wheel a is held in a raised position, that is to say, is inoperative as regards the feed movement of the paper sheets. Against the tendency of the spring 9 the bolt f is held wedged between two pins in and '5 'whichserve as brake members. These pins are arranged one at each side of the bolt 7 on a link lever is which has its fulcrum at Z and by means of a spring m is held in its highest position, it and i hold the lever 7c in its lowest or locked position. This lever by a double-armed lever a which is connected to lever 76 by a link 0. The free end' p of the lever n, is by prefer ence provided with a roller and extends into the path of the known locking pawl q resting on the arm 1 which carries the detector 8. When the arm 7" is rocked by the tripping of the detector 3 due to its contact with a sheet of paper, the pawl q descends into the path of the teeth; of the rack 6 and by engaging therewith 1s forcibly raised thus raising the lever n and thereby drawing down the lever by the movement of which the braking action of the pins h and 2' on the bolt 7 is released and the latter in being pulled up by its spring causes the combing wheels a to-be raised from the sheets.

the axis to which the detector carrier 1" is socured. The resetting of the lever is is effected in aknown manner, a driven cam y carrying a projection g which at certain periods engages with a pin or other abutment 1 suitably arranged on the bolt 7 drawing the latter down and enabling the spring on to pull the lever 70 up into locking position, when the combing wheels are again lowered to 'abt on the paper sheets.

The rack 6 is arranged on a moving rod or rack carrier 5 so that it is capable of rising thereon and to this end in the particular example shown it is connected to the rod 5 by means of links 7 and 8 and by means of a spring 9-which tends to draw the rack on to'the rod. The rod 5, moreover, carries an' adjustable stop 10 adapted to limit the rising movement of the rack 6. The rod 5 derives its movement from a crank disk y through the agency of a connecting rod 2 coiiperating with a rocker has will be presently explained. t is the roller for advancing the paper pile u and this roller is rotated in a known manner by a ratchet device comprising a ratchet The pawl q is loosely rotatable onfor instance, by.

' 1,1 iaeaa wheel '2) actuated by a pawl w which is pivoted to an oscillating arm m and by means of a; toothed gearing (not shown) causes the roller t to be rotated.

The movement of the oscillating arm w is likewise derived from the crank disk y' by means of periodically transmits driving movement to the rocker 1. To this end the rocker 1 carries a pin 2 guided in a slot 3 in the free end of the connecting rod 2 and its lower end is attached to a traction spring 4 having its other end secured to a fixed frame portion and tending constantly to draw the rocker 1, that is to say, the pin 2 into operative connection with the slot 3, carrier 5 in the (forward) direction"indicated by the arrow A. The lower end of the rocker l is also connected arrangement to the rod 5, whereby (rearward) movement is periodically imparted to the latter in the direction of the arrow B and the'extreme end of the rod 5 is connected in a similar manner to the end of the oscillating arm at for transmitting this movement to the ratchet gear of the pile feeding roller t.

Now when a sheet is fed forward by the combing wheel a the crank pin 11 rotating in the direction of the arrow C, and its for ward edge trips the detectc'ir s the locking pawl g descends as already explained into engagement with the i 'ack 6 which under the action of the spring 4 is moved forward with the rod 5, and thereby arrests the forward movement of the rack. As, however, the rod 5 continues its forward movement under the influence of the spring 4, with the pin 2 following the corresponding movement 0 the connecting rod 2, the rack 6 in engagethe connecting rod 2 which and to pull the rod or rack 1 by a pin and slot- I ment with the pawl g is caused to rise on the rod 5 as shown in Fig. 2. In this rising movement the rack 6 raises the pawl awhich in its turn raises the end 7) of the lever n whereby the brake lever is is drawn down in opposition to the action of its spring m. The locking bolt f is thus freed and flies up under the action of its powerful spring 9, in which movement it raises the bell crank lever c to the position shown in dotted lines 7,

in Fig. 1 and thereby throws the combing wheela out of action.

As already stated, the rising movement of the rack 6 is limited by the abutment 10 arranged on the rod 5, and as soon as this abutment strikes the rack in the continued forward movement of the rod 5, abovereferred to, the pawl q is caused also to arrest the further movement of the rod 5 and consequently that of the rocker 1. This rocker therefore now remains stationary, with the slot 3 gliding freely on the stationary pin 2 during the further forward rotation of the crank 12 and "lee during a certain :period of the backward rotation thereof. To this end,

the slot it in the connecting rod 2 is so calculated that the latter, only in its return movement in the direction of the arrow D and when in this movement the forward end of the slot 3 again engages the pin 2, is caused to operate the rocker 1 and accordingly the rod 5 in the direction of the arrow B, thus through the agency of the lever rotating the supply roller 25 and advancing the pile, the cam 3 in the example shown being of such dimension and so arranged with regard to the crank 3 as to hold the combing wheel in its raised position until the feed movement of the supply roller has been completed. It will be seen that this throw of the lever 42 and therefore the'extent of the feed of the paper pile u'is predetermined by the length of the movement to which the pin 2 has been moved forward by the rocker 1 under the action or in other words, by the extent of forward movement of the rod 5, depending on the engagement of the-rack 6 with the locking pawl g and the adjustable abutment 10 on its carrier. Thus the rack 6 controls by its movement both the the throw out device for the combing wheels and the extent of the return or pile feeding movement of the rack carriercr moving rod 5, or the throw of the ratchet device of the sheet supply roller, as will be readily understood.

What I claim and tors Patent is 1. Sheet feeding mechanism for paper and the like comprising the combing wheels, throw-out means for the said mechanism, a carrier, a rack yieldingly arranged thereon, a pawl cooperating with the rack and a detector for the fed sheets for moving the pawl int-o engagement with the rack to operate the looking meansby the displacement of the rack from the carrier. 2. Sheet feeding mechanism for paper and the like comprising combing wheels, throwout mechanism therefor, locking means for the said mechanism, a pawl engaging with said means to release the same, a detector engaging with the pawl, a movable carrier, a

desire to secure Letra ck adapted to move relatively to the carrier and to engage with. the necting the rack withthe spring for holding the rack carrier. 4 r i :2. Sheet feeding mechanism comprising the combing wheels, throw out mechanism therefor, locking means for said mechanism,

pawl "links concarrier and a down on the 'a detector, a pawl operated by the detector and engaging with the locking means, a carrier, a rack yieldingly carried thereby and engaging with the pawl and an adjustable of the traction spring 4,

'nected to said operating mechanism,

releasing mechanism of,

mechanism therefor, locking an adjustable stop on the throw-out mechanism for abutment on the carrier engaging the rack to limit the movement of the same and to arrest the movement of the carrier.

4. Sheet feeding mechanism comprising the combing wheels, throw-out mechanism, a detector, a pawl operated thereby and en gaging the locking means, operating mechathecombing wheels. throw-out mechanism.

therefor, locking means for said mechanism, a detector, a pawl operated thereby and engaging the locking means, operating mechanism for the wheels. a moving member cona spring direction, a

tor moving said member in one said memrack yieldingly arranged on the her and adapted to engage the awl, an adjustable abutment on the mem er adapted to engage with therack to limit the movement of the member by the spring and means for actuating the said member in the opposite direction to an extent predetermined by its preceding movement for controlling the feed of the combing rollers.

6. Sheet feeding mechanism comprising combing wheels, throw-out. mechanism therefor, a clamping device for locking and releasing said mechanism, a moving member. a rack movablv carried thereon, a pawl, a detector for moving the pawl into engagement with the rack. and a member operated by the pawl through the agency of the rack for actuating the clamping device. '7. In sheet feeding mechanism for paper and the like, the combination of a carrier, a rack movably arranged on the carrier, a pawl adapted to engage with the said ack, said carrier and the said rack, a the combing wheels, a devipe for releasing and locking the said releasing mechanism controlled by the engagement of the said rack with the said pawland operating mechanism for the sheet supply roller controlled by the engagement of the said rack with the said pawl, all substantially-as shown for the purpose specified. In testimony whereof I have affixed my signature in presence of two witnesses.

GEORG SPIESS.

adapted to engage with Witnesses RUnonrn FBICKE, Doms Kenna.

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