US1771652A

US1771652A - Sheet-feeding mechanism

Info

Publication number: US1771652A
Application number: US637626A
Authority: US
Inventors: Novick Abraham
Original assignee: FL Smithe Machine Co Inc
Current assignee: FL Smithe Machine Co Inc
Priority date: 1923-05-09
Filing date: 1923-05-09
Publication date: 1930-07-29
Anticipated expiration: 1947-07-29

Description

" 9 A. -ov|| 1 1,771,652]

SHEET FEEDING MECHANISM Original Filed May 9, 1923 5 Sheets-She't, V 1 I avwentoz Jilly 29, 1930.

A. NQVICK SHEET FEEDING MECHANISM Original Filed May 9, 1923 5 Sheets-Sheet 2 w gm awueuboi M /Zia vfiwt A. NOVICK July 29, 1930.

Original Filed May 9, 192 5 sheets-sh et 3' July 29, 1930. A NOVICK, 1,771,652

SHEET" FEEDING MECHANISM Original Filed May 9, 1923 v 5 Sheets-Sheet Patented July 29, 1930 UNITED STATES PATENT OFFICE vvvv ,o

ABRAHAM novrcx, F FLUSHING, NEW YORK, Assieuon we I. LL smI'rnE MACHINE coMrANY, mconronArnn, on NEW roux, N. Y., A CORPORATION on NEW YORK snnnrrnnnme MECHANISM Application filed May 9, 1923, Serial No. 637,626. Renewed April 28, 1929.

This invention relates to mechanisms for feeding blanks, particularly blanks of paper or like sheet material. It is primarily concerned with a feeder whereby the blanks are 5 fed individually from a stack into mechanism for operating on the blanks, as for example envelope making machinery. But it will be understood that the invention in its broader phases is not limited to such use. l

The feeder of the present invention is of the general type in which the individual blank is separated from the stack by having its leading end inserted into a conveying mechanism, as for example feed rolls, this insertion being accomplished by means of a plurality of devices acting on the blank in sequence to separate or deflect its leading end from the stack. In the preferred form of embodiment of the invention the first of these devices is a pneumatically operable member, herein termed picker, for effecting an initial separation of the blank from the stack, and the other is a mechanically operable device herein termed defiector, which is introduced between the so'separated blank and the stack to carry the deflection further and insert the leading end thereof into the conveying or removing mechanism.

An important feature of the present in vention consists in controlling the two separating devices, namely the picker and deflector in such manner that during the time when one of them is operating on a blank the other is being returned into position for its next operation. By virtue of this feature the operation on the one blank is commenced while the operation on the other blank is still in rogress, so that an exceedingly high speed ofoperation may be efi'ected. This feature is of particular importance when the picker is pneumatic in character, as in the preferred form of embodiment herein described, because the picker is given ample time to secure its suction hold on the one blank during the time the deflector is performing its operation on the preceding blank. The feeder of the present invention, there fore, is capable not only of a high speed, but also of an unusual accuracy and uniformity of operation.

A further feature of the present invention consists in providing mechanism whereby each of the separating devices, namely the picker and deflector, after finishing its operation,-is entirely withdrawn from the path described by the blank in response to the operation of the other of the separating devices, so that all buckling of the blank or other interference with its free movement is obviated; This again serves to augment the speed of operation of which the feeder is capable.

In the preferred form of embodiment of the invention, the 1picker is operated in a direction substantia ly at right angles to the bottom of the stack to initiate the deflection of the individual blank, and the deflector is operated in a direction substantially parallel to the blanks of the stack, being introduced into the space between the separated blank and the stack and moved inwardly so as to bear obliquely against the face of the blank. The deflector is preferably so guided that there is a clearance space between its upper edge and the stack and between its lower edge and the blank at the time it enters between the stack and the blank, so thatthere is no danger of its tip striking the forward edge of either.

Close adjustment of the operating parts need, therefore, not be maintained.

In the preferred form of construction the withdrawal of the picker from the path of the blank is accomplished by tilting its nozzle from under the stack during its return into operative position. of this construction consists in the provision of mechanism whereby the tilting operation may be accomplished independently of the blank-deflecting movement of this device. By virtue of this mechanism each movement may be accomplished by devices operable and adjustable independently of the other. Si1nplicity and rigidity of construction and facility of operation and adjustment are thus achieved.

The above and various other features and objects of the invention will now be described more in detail with particular reference to the accompanying drawings in which Figure 1 is a diagrammatic side elevation A further feature loo showing the invention in a preferred form of embodiment;

Figure 2 is a view showing the parts of Figure 1 in plan view;

Figures 3, 4, 5, 6 and 7 are views showing parts of Figure 1 in successive stages of op eration; and f Figure. 8 is a side elevation showing the manner of mounting of the table of the machine. W

Similar characters of reference designate similar parts in each of the several views.

In Figure 1 of the drawing the stack of blanks is indicated by reference character A, the feed rolls between which the individual blanks are to be inserted are denoted by reference character B, the picker for initiating the separation of the individual blanks from the stack is marked C, and the device for carrying the separation further and introducin the blanks into the feed rolls is indicated y D. The above-named means constitute the main operating members of the mechanism and their construction and operation will now be described in detail.

The stack A is supported by the table 1,

I which is mounted on pivots 2 (Figure 8) in the side frames 3 of the machine, so as to be adjustable in height at its forward end, by means of set screws 4 cooperating with fixedmembers 3 of the frame. The table extends be 0nd the set screws 4 a distance such thattiie tip 1 terminated substantially over the center line of one of the rollers 20 of the feed rolls B.

Mechanism comprising vertical rods 5 is provided for guiding the blanks at convenlent reentran-t corners thereof the sitions .of these rods being adjustable as in usual practice. The table is preferably inclined downwardl towards its orward end so as to cause the b anks, by force of gravity, to remain in engagement with the, uide rods 5. The blanks are so placed on t e table that their leadin ends project beyond the table ustrated in Figure 1.

e feed rolls B are suitably mounted in the side frames '3 of'the machine torevoive in contact with each other, with their line of; contact below the rojecting ends of the blanks. The one ro ler 20 of the feed rolls has an unbroken peripheral surface, whereas the other roller 21 is mutilated, being provided with a cup 22,'the object of which is to receive the leading edge of a blank aboiilit to be introduced between the rolls. pivots of roller 20 are fixed, but those of roller 21 are movable, the latter being providedon an arm 23 adapted to swing about pivots 24 in the side frames of the machine.

A spring 26, the pressure of which may be adjusted by means of a screw 25 mounted on the frame of the machine, serves to hold roller 21 in resilient engagement with roll 20, so that a blank introduced into the rolls provided at its end with a nozzle 28 for engaging the lowermost blank of the stack at its leadin edge. The tube 29 is connected through exible tubing to a source of suction not illustrated in the drawing. Tube 29 is firmly fixed in a block 31, which block is mounted on a rod 32 by means of a second block 30 against which block 31 is clamped by screws 33. The angular position of the picker with respect to rod 32 is adjustable and may be fixed by means of a set screw 34:.

The picker is capable of two separate and independent movements, one of these being an up-and-down motion with reference to the stack, and the other a tilting or rocking motion. The up-and-down motion of the picker takes place about a pivot 35 fixed in the frame of the machine at a point approximately in the plane of the paper, the picker being supported on this pivot by means of a link 36, the free end of which is provided with a roller 37 for riding on a'cam 38 mounted on a shaft 39. Resilient means, not shown,

are provided for holding the cam rollers in engagement with the cam. The shape of the cam surface is such that, as the cam rotates sition such as indicated in Figure 3, remains in this position for a period of time, and thereupon returns to its elevated osition, shown in Figure 1. The cam 39 an link 36 are duplicated on the opposite side of the machine, as illustrated in Figure 2, for purposes of greater mechanical strength and rigidity of the picker support.

Air is exhausted from the picker nozzle during its downward movement, so that the lowermost blank of the stack is caused to follow this movement. This 0 eration, therefore, serves for the purpose of efiecting the free end of the blank away from the stack through a slight angle, such as indicated in Fi ure 3. The upward movement of the pic er serves merely to re-apply the nozzle to the stack. It will be observed that the nozzle is held in engagement with the stack during an entire half revolution of the cam, so that a suflicient time interval is provided for the suction nozzle to secure the proper hold on the blank. A separator 101 (Figure 2) of usual construction,- is provided for supporting the forward edge of the-stack, and for preventing more than one blank being carried down by the picker nozzle at a time.

The tilting operation of the picker is for the purpose of permitting the picker to be returned to its upper position without obstructing the path of the blank which has end of lever 43 cooperates with a cam 46 mounted on cam shaft 39. Suitable resilient means are provided for holding the roller in engagement with the cam. Cam 46, it will be observed, is circular throughout the greater portion of its circumference, except for a It is this portion which,

small portion 46. serves to rock lever 43 about pivot 44, the movement impressed on roller 45 being communicated to the picker through lever 43 and link 42.

It will be observed that the rocking movement of the picker is timed so as to occur when the picker is moving from its lower to 1ts upper position. The tilt of the picker, as illustrated'in Figure 5, is such that its edge clears the leading edge of the detached blank as the picker returnsto its upper position. Upon reaching this position, the nozzle s returned to the horizontal position and 1s thus brought into operative engagement with the stack, as illustrated in Figure 7 To provide clearance for the rock ng movement of the picker, roll 21 is provided with a circumferential recess 47, slightly greater in width than the picker nozzle, into which recess the picker projects in its tilted position, as indicated in Figure 5. The movement of the picker nozzle may be ad usted by means of a horizontal slot 48 in lever 43, and a vertical slot 49 in lever 41.

As hereinabove mentioned, the two motions of the picker, namely the movements about centers 35 and 40, respectively, are 1nde endent of each other, either movement being capable of being-performed without causing appreciable effect on the other. Undue wear or binding of the parts is thus eliminated and adjustment is facilitated. This is accomplished in the preferred form of embodiment by placing the point 43 at whlch link 42 is fulcrumed to 43 close to the center 35. For purposes of practical design, this condition need only be approximated, as apparent from the drawings, because of the smallness of the movements involved, Lever 43, moreover, is pivoted at such a point that its movement in response to cam 46 causes point 435 to move in a direction substantially radial to center 35, i. e in a line connecting center 35 with the point 42 r at which lever 42 is joined to crank 41. By virtue of this feature, the rocking motion of the picker is made independent of the angular position of the link 36.' The slot of crank 41', furthermore, extends from center 40 in' a direction substantially concentric to point 43 and the slot in the end of lever 43 extends substantially concentric to pivot 44, so that the above-named condition holds true irrespective of the particular position to which link 42 may be adjusted. Each of the link mechanisms is thus capable of effecting its movement without interference from the other, and adjustment of one movement may be made without upsetting the adjustment of the other movement.

While the pneumatically operated picker thus" serves to bring about an initial deflection'of the blank from the stack, the insertlon of the blank into the feed rolls is accom plished by the mechanically acting deflector D, the movement of which is in a direction substantially at right angles to the deflecting movement of the picker, namely in a plane substantially parallel to that of the blanks in the stack.

In the illustrated preferred form of embodiment, the deflector consists of a bifurcated member 50, the forksof which are spaced from each other a suflicient distance to permit nozzle 28 to move between them. The deflector is mounted on a crank 51- pivoted on a shaft 52 journaled in side frames 3. This shaft is provided with a crank 54 having a cam roller 55 which cooperates with a cam 56. The shape of this cam is such as to cause an in-and-out movement of the deflector during each rotation of the cam. The inward movement commences when the picker is in its lower position, illustrated in igure 3, and serves to introduce the deflector between the stack and the sheet detached ure 7. At this time the edge of cup 22 engages the blank and thus clamps the same between the rolls. The cam now causes the defiector to be withdrawn to its outer position in which it remains during the downward movement of the picker, so that the edge 57 is outof the path of movement of the blank asses over the face of the free I which subsequently is carried down by the picker. I v

It should be noted that the deflector in its inward and outward movements is guided by means of an extension 50' which runs between rollers 59 and 60, the former of which is adjustably mounted on a shaft 61 fixed in the frame of the machine, and the latter of which is mounted on a bracket 62 adjustably secured on shaft 61.by means of a collar 63. The shape of extension 50 and the positions of rollers 59 and 60 are such that the inward and outward movements of the deflector are in a plane substantially parallel to the plane of the sheets in the stack.

"Fromthe above description of the various part's-andtheir functions, the operation of the complete machine will be readily understood.v In the position illustrated in Figure 1, the picker nozzle is partially exhausted of air and is firmly pressed against the stack, so that when a momentlater it is moved 1 downward, the lowermost blank is carried along into the position shown in Figure 3. The deflector D now moves inwardly between the blank and-the stack, but out of contact picker nozzle at a small distance below the deflector forks. Engagement of the tip of the deflector with the edge of the blank is thus prevented. The deflector, in fact, has ample clearance between both the stack and the blank, so that the need of maintaining great nicety of adjustment is obviated,

The deflector remains in the pos tion of Figure 4 for a shortperiod of time in order to permit the. roller 21 to come into position for receiving the tip of the blank within its cupi, During'thi's time the picker releases its hold on the blank (see Fig. 5), and commencesdts return movement, with the picker nozzle tilted'so as to avoid contact with the leading edge of the blank. The deflector then recommences itsinward movement and thus bends the leading edge of the blank (see F gure 6) into the cup of roller 21, as hereinbefore described. The'picker nozzle at this time has completed its return movement and' is about to engage the next bla-n-k of the stack. As this engagement takes place the deflector finishes itsinward movement and the feed rolls bite the deflected blank between them so as to pull it out of the stack and pass it to subsequent operating mechanism not shown in the drawing. It should here be observed that the roll20 is placed so close to the stack that the leading end of the blank is literally bent about the roll when the deflector approaches the roll. As soon as the feed rolls take hold of the blank, the deflector is quickly withdrawn into the initial position shown in Figure 1, so as to be out of the path of the deflection movement of the next blank. This vmovement takes place a moment later, suction having been restored in the picker nozzle the moment the-same entered into engagement with the stack.- The train ofoperation is then re eated. V

Itwi 1 thus beapparent that the cycle of operations of the picker and deflector overlap each other, the one being reset into position for its next operation while the other is either performing its operation or commencing to perform the same. The total period of time for the composite cycle is thus materially reduced. Each separating member, moreover, i. e., the picker as well as the deflector, is moved out of the path described by the blank when acted upon by the other separating member, so that the movement of the blank is entirely unobstructed. Each operating member of the present form of construction, furthermore, performs a function which is simple in itself, and all parts areof rugged design. High speed of operation therefore may not only be reached but actually maintained for indefinite periods of time.

Although I have herein shown and described only one form of mechanism embodying the invention, it will be readily understood that many changes and modifications may be made therein within the scope of the following claims without departing from the spirit and scope of the invention, it being my intention to claim the same broadly in whatever form its principles may be employed.

WVhat I claim is:

1. In combination, stationary means for supportin a stack of blanks with their leadmg ends ree to be deflected from the stack, and means for deflecting individual blanks of the stack, said means comprising a plurality of deflecting members operable in succession on a blank for effecting successive deflections thereof, and means for removing the first deflecting member from the path described by the blank under the action of the second deflecting member.

2. In combination, stationary means for supporting a stack of blanks, means for withdrawing blanks from the stack, and a plurality of blank moving devices for operating in succession on individual blanks of the stack for inserting the leading ends thereof into said withdrawing means, and means for each of said devices for withdrawing the same from the path described by the blank when operated upon by the other of said devices.

3. In combination, means for supporting a stack of blanks with their leading ends free to be deflected from the stack, means for deflecting individual blanks of the stack, said means comprising a plurality of members for eflecting successive deflections thereof, each of said members projecting into the path described by the blank upon deflection from the stack, and means for withdrawing each mem- A l succession on individual blanks for deflect-' ing the same from the stack, one of said members being arranged to engage the blank by pneumatic force, and the other of said members being arranged to engage the blank by mechanical force.

6. In combination, means for supporting a stack of blanks with their leading edges free to bevdeflected from the stack, a picker for initiating deflecting movement of an individual blank of the stack, a deflector for carrying further said deflecting movement and being positioned above the nozzle of the picker and substantially parallel thereto prior to its engagement with said blank, said picker and deflector operating in non-intersecting paths.

7. In combination, means for supporting a stack of blanks with their leading edges free. to be deflected from the stack, a picker for initiating deflecting movement of the blank, and a deflector for carrying further said defleeting movement, and means whereby the picker is withdrawn from 'the pathof the blank and reset into position for the next ensuin operation during the operation of t the de ector.

8. In a device -for removing individual blanks from a stack of such blanks, conveying mechanism, means reciprocable in a direction substantially at right angles to the blanks of the stack for detaching individual blanks from the stack, and means reciprocable in adirection substantially parallel to the plane of the blanks for inserting said blanks into said conveying mechanism.

9. In a device forremoving blanks from a sack of such blanks, conveying means for the blanks, a picker operable by pneumatic force for detaching a portion of a blank from the stack, reciprocating means operable subsequently to said picker for engaging the blank to cause the. same to enter said con-. veying means, and means for resetting the picker into operative position during the period of operation of said reciprocatmg means. i I

10. In combination, means for supporting. a stack of blanks, means for withdrawing the blanks from said stack, meansfor insertin individual blanks of said stack into sai withdrawing means, said means comprisin a member for entering between the blank an the stack, and means for retracting the said member to position for the next ensuing operation while the said withdrawing means is operating." i

11. In combination, stationary means for supportin a stack of blanks with their leadingends ree to be "deflected from the stack,-,

means for deflecting individual blanks from said stack, said means comprising a. ioke r for providing initial deflection of the lank from the stack, a. deflector for providing a further-deflection of the blank from the stack' 1 and means whereby said deflector-is-caused to bear obliquely against the face of the blank and to reciprocate longitudinally over the greater portion of the leading free end of the deflected blank. 1 12. In a device for deflecting individual blanks. from a stack of such blanks, means forv causing an initial deflection of a blank from the stack, means operable in a plane approximately parallel to that of the blanks of the stack for causing an increase in the deflection of the blank, and meansfor retracting either of the said means when the other is operating.

13. In combination, means for supporting I a stack of blanks with their ends free for being deflected from the stack, means movable at right angles to the blanks of the stack for slightly deflecting individual blanks from the stack, means operable in a lane substanfor withdrawing the blanks from said stack, I

said meanscomprisin a plurality of rotating elements and'means or deflecting individual x blanks irom the st'ack aiid inserting the same into saidikremovin "means; said removing means-bein place 'di'r'ectly below the free ends ef t y j so close stack 'th'at the blank to be insertedfinto -}f removing means is substantially; tangential to said rotatingjelement. y

*15. In vcombination, stationar f means for lankswith one. of said elements supportin a stack of blanks wit their lead ing ends ree to be deflected from thestack,

a lurality of feed rolls for removing indivi ual blanks from the stack, one of said rolls being provided with a on for receiving the leadingztip ofa deflected iilank, and the other of said rolls being placed in such position with referenceto said first-mentioned roll and the supporting means for'the stack that the blank, in order to be inserted between the rolls, must be laid against the firstmentioned roll, and means for. deflecting indivi-dual blanks :fromthe stack and laying them against said roll;

16. In combination, means for supporting a stack of blanks, a picker for deflecting the leading ends of individual blanks away from the stack, first means for impressing movement on said pickerabout a first center approximately in the plane of the blank about to be deflected, and second means for impressing movement on said picker about a second center approximately in line with the forward ed e of the stack;

17. The evice according to claim 16, in which the said first and second means comprise mechanism whereby either of said movements of the picker may be efi'ected independently of the other movement.

18. .The device according to claim 16, in which the first means comprises a member containing a point movable close to, and in a direction substantially parallel to, the leading edge of the stack and in which the said second center is placed at-the said point.

19. In combination, a pneumatic picker, means whereby said picker is mounted to be free to rotate about either of a plurality of centers, and means for rotating said picker about either of said centers without afppreciable rotation about the other of said centers.

20. In combination, a pneumatic picker, means whereby said pick'er is mounted to be free to rotate about either of a plurality of centers, a cam for controlling movement of the picker about one of said centers. a second cam for controllin movement of the picker about the-other o said centers, and means whereby each of haid cams is rendered effective to exercise its control over the picker independently of the other cam. I

21. In a' device for detaching in i idual blanks from a stack-of such blanks, the combination of a pneumatic picker and a mechanical deflectorfor operatlng on the blanks in succession to deflect the same from the stack, and-means for returning the picker into operative engagement with the stack during the time the said deflector is engaged in its deflecting operation.

22. In a feeding mechanism, a table for supporting a stack of blanks with their leading ends extending over the forward end of the. table, a plurality of feed rollers, a pneu- "matic' picker, a link, means-foropera-ting said link, means i'for'pivotally. mounting said picker on said link, means for rocking said picker about'isaid pivot, a deflector, means Rfor reciprocating saidideflector, means' for 1 ding said 'deflectoifto'..-move substantially -para'llel to" the blanks of thc'stack'to introduce the'rleadingamd;aria blank into the .feed rollers; 2331a ar machine-mfi'theirkind described,

- in dombination, a picker for engaging a blank offa "stackmdiacent 'one'ed'ge of the blank'for deflectinig iia'and a deflector 1 reciprocable -in a path substantially parallel to the planes of the blanks in the stack and at right angles to the deflected edge of the blank.

24. In a blank feeding apparatus, in combination, means for supporting a stack of blanks with their leading margins extending clear of, the support and with their rear margin pressed toward the support, a pair of cooperating feed rolls near the stack, one of said rolls having a gap therein, and means operating between the stack and the feed rolls and in non-intersecting relation to the latter for bending an end blank of the stack to introduce the leading end thereof into the feed roll ga and between the feed rolls before the blank as been-separated bodily from the stack. k

25. In combination. means for supporting a stack of blanks, a picker for deflecting the leading ends of individual blanks away fromthe stack, first means for impressing movement on said picker about a first center approximately in the plane of the blank about to be deflected, and second means for impressing movement on said picker about a second center approximately in line with the forward edge of the stack, said first means comprising a lever pivoted at the first center and containing a point movable close to and in a direction substantiall parallel to the leading 9 edge of the stack, t e second center being placed at said oint.

26. The device according to claim 25, in which the mechanism for effecting movement about the second center comprises a link having a point located close to the first center, means for moving said link so as to cause the said point thereof to move in a direction approximately radial to said first center, and means for effecting movement of the picker about the second center.

27. In a device for separating individual blanks from a stack of such blanks, means for securing an initial separation of a blank from the stack, a stack to further deflect said blank, and means for guiding said member so as to provide clearance between said member and the stack and between the member and the blank and for maintaining'movement thereof substantially parallel to the plane of the blank.

ABRAHAM NOVICK.

Ill