US1394574A - Sheet-feeding mechanism for paper and the like - Google Patents

Description

E. E. PALMER. SHEET FEEDING MECHANISM FOR PAPER AND THE LIKE- APPLICATION HLED NOV. 29, 1920- Patented 001;. 25. 1921.

3 SHEETS-SHEET l- INVENTUR. 15 (g E. E. PALMER. SHEET FEEDING MECHANISM FOR PAPER AND THE LIKE.

APPLICATION FILED NOV. 29, 1920- I Patented Oct. 25, 1921;

3 SHEETS-SHEET 2.

INVENT ER.

I E. E. PALMER. SHEET FEEDING MECHANISM- FOR PAPER AND THE LIKE.

PP LICATION FILED NOV. 29, 1.920.

- Patented 001;. 25, 1921.

3 SHEETS-SHEET 3.

INVENTUR.

fidwwwl OFFICE.

ERNEST n. PALMER, or, TORONTO, ONTARIO, CANADA, ASSIGNOR To TORONTO TYPE FOUNDRY COMPANY, LIMITED, or TORONTO, ONTARIO, CANADA.

SHEET-FEEDING MECHANISM FOR PAPER AND THE LIKE.

Specification of Letters Patent.

Patented Oct. 25, 1921 Application filed November 29, 1920. Serial No. 427,096.

T 0 all whom it may concern:

Be it known that I, ERNEST E. PALMER, of the city of Toronto, in the county of York, Province of Ontario, Canada, a subject of the King of Great Britain,=have invented certain new and useful Improvements in Sheet-Feeding Mechanism for Paper and the like, of which the following is a specification.

This invention relates to sheet feeding mechanism of the well known type in which the individual sheets are feathered .out and fed forward from a pile of sheets by combing wheels, adapted to be thrown and held out of action as soon as they have fed a sheet to a certain predetermined position and until such sheet has been removed. I

More particularly the invention relates to feeders of the type in which the combing wheels are thrown out of action by means of a reciprocating cut-out rack which is put into operative connection with means for lifting the combing wheels by the lifting of a detector finger by a sheet passing under the .same.

In such mechanism it is my object to provide a construction in which the transfer or feed drum which feathers the sheets is con trolled to operate only while the combing wheels are operative, to provide improved means for throwing the combing wheels out of action, and to provide simple and effective dabber mechanism to hold the remaining sheets while the combing wheels are raised and the firstsheet is being drawn away by the mechanism to which sheets are being fed- I attain my object by means of the constructions hereinafter described and illus-' trated in the accompanying drawings in which Figure 1 is a plan View of part of a sheet feeder provided with my improvements;

Fig. 2 a side elevation of the same;

Fig. 3 a vertical section of part of the same showing particularly the combing wheels and means for throwing the same out of action;

Fig. 4 a rear view of the same parts;

Fig. 5 a side elevation, partly insection, of part of the operating mechanism for the transfer or feeding rolls;

Fig. 6 a rear elevation of the dabber mechanism; a

Fig. 7 a side elevation of the parts shown in Fig. 6; and

Fig. 8 a side elevation showing. the rela tiv-e positions of the dabber operating cam, the crank disk operating the feed roll and cut-out rack, and the cam for lifting the combing wheels.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

1 is part of the transport board of the sheet feeding apparatus provided as usual with feeding tapes 2 Operated in any suitable manner. 3 is the transfer or feed roll between which and the curved guides 4 the bank of paper is passed, which paper by the operation of the feed roll is feathered out as shown, this arrangement being old in the art.

The feed roll is operated by the pivoted rock arm 5, which carries a pawl 6 engaging the ratchet wheel 7 fast on a stub shaft 54L driving the spindle of the feed roll 3 by means of the gearing 42. This rock arm has an adjustable bolt and slot connection 8 with one end of a connecting rod 9, the other end of which is connected by an adjustable bolt and slot connection 10 with one end of a lever 11 of the first order fulcrumed on the'frame of the machine, and which is operated by a rocking member 12 pivoted on the frame of the machine and engaging the upper end of the lever by a pin and slot connection 13. This rocking member is actuated by means of the pivoted connecting rod 14, the other end of which is connected by a wrist pin with a crank disk 15 on the constantly running shaft 16 of the apparatus. This shaft is actuated inany ordinary manner as will be understood by those conversant with the art.

The rocking member 12, it will be noted, is formed of two arms, one connected with the lever 11 hereinbefore described and the other connected by means of a pin and slot connection 17 with the cut-Out rack 18 slidably supported on the frame of the machine. This rack thus has a regular reciprocating movement imparted thereto while the machine is in operation. The particular function of this cut-out rack is to raise the to the mechanism to which they are fed. The

iournaled in the frame of the machine.

combing .wheels are carried on gear boxes 19 formed as bellcrank levers and journaled on the constantly, rotating shaft 20, which is driven in any manner known in the art, the combing wheels being driven by a train of gearing 21 from this shaft so that the combing wheels are constantly rotating when the machine is in action.

22 is a bell crank lever fulcrumed on the 2 a stationary part of the machine, the combing wheel then being inits lower position engaging the topmost sheet of the feathered bank of sheets. By rocking the cam to the position shown in Fig. 3, the combing wheel is raised.

The operating and controlling mechanism for the cam is substantially as follows: 27 is a detector finger secured to a shaft %8 0 this shaft 28 is secured an arm 30 which normally engages a shoulder 32 formed on the'hub of the cut-out pawl 81 pivoted on a downward extension of the cam 24. This detectorfinger 27, as is common in the art, extends over a. grooved pulley 29 over which the paper-passes from the transfer board to the mechanism to which it is'to be fed. Normally the detector finger drops down into the grooved pulley as shown in Fig. 2. The passage of a sheet of paper, however, raises it to the position shown in Fig; 3. This movement lifts the rock arm secured to the shaft 28 and releases the cut-out pawl 31 and allows its end to drop down by its own weight into engagement with the cut-out rack 18. The result of the pawl being'brought into engagement with the out out rack is that on the movement ofthe rack to the left as shown in the drawings, the cam 24 is forced to the positionshown in Fig. 8, and the combing wheels thus raised. The instant the rear end of the sheet of paper passes from under the detectorfinger, the finger is free to dropand releases the rock arm 30 to reengage the shoulder 32 of the pawl 31. Continued movement of the rack to the left brings the shoulder into position for reengagement with the arm, which-promptly drops into place. Movement of the rack to the right then disengages it from the pawl'and leaves the latter free to lift as the spring 26 returns the cam 24 to the position shown in Figs. 1

and 2. From the above descriptioniit will be seen that the lifting of the combing wheels is effected positively and not by the snapping action of the springs, thus avoiding the noise and jar of spring lifts and the trouble and expense of replacing broken springs.

I finditvery desirable that the operation of the stepwise movement of the feed roll should occur when the combing wheel is in operation and only at such times. I therefore provide the following mechanism whereby the movement of the combing wheel operating mechanism controls the operation of the feed roll. On the shaft 33, to which is connected the bell crank lever 22, I secure an arm 34, which, by means of the connect ing rods 35 and 36 and the bell crank levers 37 and 38, actuatesthe slide 39 provided with a slot 40 through which passes the spindle of the ratchet wheel 7. The upper end of the slide is provided with a curved surface 41 adapted to engage the pawl to raise it out of engagement withthe ratchet wheel, the pawl at such times sliding idly backward and forward on the curved surface 41. It will thus be seen that the raising of the combing wheel also throws the feed roll out of gear.

I find it desirable when the top sheet of the feathered bank of sheets is being drawn away by the mechanism to which the sheet is being fed that the next sheet should be temporarily held to prevent it being drawn forward with the top sheet. I therefore provide a dabber 43 which operates between the combing wheel and the feed roll. This dabber is brought into operation at or aboutthe moment that the feeding movement of the transfer roll ceases. The dabber is actuated by a cam, 44 fast on the constantly justable swinging movement on the end of 47 is securedto a shaft 49 suitably journaled longitudinally of the apparatus, to which is secured a'disk 50 having its periphery notched to form a shoulder 51 engaged by a finger 52 extending laterally from the rear end of the lever 45. A coil spring 53 is secured to the rocking lever 45 and to a suitable stationary part and tends to maintain the roller 46 in contact with the cam 44. By the operation of the cam 44 it is evident that thedabber will be vertically moved as desired. i

In general, the operation of the apparatus is as in other sheet feeders of the same general type, a bank of sheets being feathered out and combed away one by one, the combing and the operation of the feed roll, however, being automatically stopped, in my apparatus, at such times as a sheet is passing under the detector finger.

What I claim as my invention is:

1. In sheet feeding mechanism, the combination of a cut-out rack; an oscillatable cam; a cut-out pawl pivoted on said cam adapted to engage the rack; means normally holding said pawl out of engagement with the rack; a pivoted detector finger operable by the passage of a sheet of paper and adapted to cause the engagement of the pawl with the rack; a vertically movable combing wheel; means operable by said cam for moving the combing Wheel to its inoperative position; and yielding means tending to return the cam to its normal position.

2. In sheet feeding mechanism, the combination of a reciprocating cut-out rack; an oscillatable cam; a cut-out pawl pivoted on said cam tending to engage the rack and having a shoulder on its hub; a detector shaft; a detector finger secured thereto; an arm on the detector shaft adapted when the detector finger is lowered to engage the aforesaid shoulder to hold the pawl out of engagement with the rack; a vertically movable combing wheel; means operable by said cam for moving the combing wheel to its inoperative position; and yielding means tending to return the cam to its normal position.

3.. In sheet feeding mechanism, the combination of a feed drum adapted to feather the sheets; means for imparting a stepwise movement of rotation to the drum including a ratchet wheel and a rock arm carrying a pivoted pawl; a combing wheel; a detector finger; means conditioned for operation by the lifting of the detector finger for raising the combing wheel; and means for lifting the pawl to cause cessation of the movement of the feed drum while the combing wheel is raised.

4;. Sheet-feeding mechanism constructed as set forth in claim 3 provided with a dabber adapted to engage the feathered sheets; and means for briefly engaging the dabber with the sheets at or about the time the combing wheel is raised.

5. In sheet feeding mechanism, the combination of a feed drum; a ratchet wheel adapted to rotate the drum; a pivoted rock arm; a pawl carried by the rock armv engaging the ratchet wheel; means for regularly oscillating the rock arm; means for holding the pawl out of engagement with the ratchet wheel while the rock arm is oscillating; a

vertically movable combing wheel; a piv oted detector finger operable by the passage of a sheet of paper; means conditioned for operation by the lifting "of the detector finger for raising the combing wheel; and means operable by the operation of the combing wheel lifting means for actuating the aforesaid pawl lifting means whenever the combing wheel is lifted.

6. In sheet fee-ding mechanism, the combination of a feed drum; a ratchet wheel adapted to rotate the drum; a pivoted rock arm; a pawl carried by the rock arm engaging the ratchet wheel; a lever of the first order fulcrumed on the frame; a connecting rod pivotally connected to the rock arm and to one end of the lever; a rack bar slidable on the frame; a rocking member adapted to actuate the rack bar and the lever; constantly rotating shaft; means for converting the rotary movement of said shaft into a rocking movement of the rocking member; a vertically movable combing wheel; means normally inoperative actuable by the rack bar for raising the combing wheel; a detector finger adapted to condition said means for operation.

7. Sheet feeding mechanism constructed as set forth in claim 6 provided with means operable to hold the pawl out of engagement with the ratchet wheel while the rock arm is oscillating; and means operable by the combing wheel raising means, when raising said wheel, for causing the operation of the pawl raising means.

8. Sheet feeding means constructed as set forth in claim 6 provided with a vertically movable dabber adapted to engage the sheets between the feed drum and combing wheel; and a cam on the constantly rotating shaft adapted to actuate the dabber at or about the time the combing wheel is raised.

9. In sheet feeding means, the combination with a feed drum and combing wheel of a dabber adapted to engage the sheets between the feed drum and combing wheel; a rock arm carrying the dabber; a shaft longitudinal of the machine to which the rock arm is connected; a rocking lever parallel with the shaft; means whereby the rocking of the lever rocks the shaft; a con- 110 stantly rotating shaft; and a cam on said shaft engaging the lever.

Signed at Toronto, Can, this 17th day of November, 1920.

ERNEST E. PALMER.

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