US323331A

US323331A - Sheet-delivery apparatus for pri nt

Info

Publication number: US323331A
Authority: US
Publication date: 1885-07-28
Anticipated expiration: 1902-07-28

Description

2 Sheets-Sheet 1.

(No Model.)

J. T. HAWKINS.

SHEET DELIVERY APPARATUS POR PRINTING PRESSES.

Patented July 28, 1885.

2 Sheets-Sheet 2.

(No Model.)

J. T. HAWKINS.

SHEET DELIVERY APPARATUS POR PRINTING PRESSES. No. 323,331.

Patented July Z8, 1885.

llinirnn drains n'rnnr @trice JOHN T. HAVKDTS, OF TAUNTON, MASSACHUSETTS.

SHEET-DELIVERY APPARATUS FOR PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 323,331, dated July 28, 1885.

Application tiled February 11, 1885. (Xo modd.)

To all whom. t may concern.-

Be it known that I, JOHN T. Hiwnrns, of Taunton, in the county of Bristol and State of Massachusetts, have invented certain new and useful Improvements in Sheet-Delivery Apparatus for Printing-Presses, which invention or improvements are fully set forth and illustrated in the following specification and accompanying drawings.

The object ot' this invention is to deliver the 4sheets from the top and front of the cylinder of a cylinder printing-press directly7 to a delivery-board in an even pile, with the last printed side uppermost, without contact of the printed parts of said last printed side with any part ofthe mechanism.

Following is a brief general description of the means used to accomplish the object above mentioned. A series of stripper or receiving lingers are provided for stripping the sheet head tirst from the top of the impression-cylinder and receiving its entire length thereon, and thereafter moving the said stripper or receiving fingers horizontally, or practically so, away from the cylinder, said fingers being set at either a fixed angle or at varying angles to the horizontal sutlioient to permit of the resistance of the air,keeping the sheet in contact with them until the sheet is allowed to drop clear of said lingers upon their return again to the posit-ion for receiving the succeeding sheet, the resistance of the air on the under side of the sheet preventing its return with said ingers.

In practice with this method ithas been found that at high speeds the sheets have sut'- icient momentum to cause them to continue on in their direction of motion when the motion ofthe stripper or receiving fingers is arrested, and with thin paper it has been found iinpracticable to arrest the motion of a sheet by contact with anything like astop against the sheets leading edge, any such device causi `g the sheet to double up and preventing its deposition in an even tlat pile. To prev'ent this, two or more stationary pressure-stops are used, adjusted to come in cont-act with the unprinted margins or some other unprinted spots on the upper or last printed side ot' the sheet just at the time the stripper or receiving fingers are brought to a stop at the termination of their outward stroke, these stops being adjustable, so as to press upon the sheet near to its tail or following end, thus arresting its motion by that end and allowing the sheet to quietly drop upon the pile by its own weight merely upon the return of the stripper or receiving fingers toward the cylinder.

The invention consists of the parts and comv binations of parts hereinafter described, and set forth in the claims.

In the accompanying drawings, Figure l is a side elevation of those parts of a two-revolution-cylinder printingpress necessary to illustrate the invention (shown as delivering the sheet) during its second or non-printing revolution from its top to and upon the stripper or receiving fingers. Fig. 2 is an end elevation of the machine. Fig. 3 is a side elevation of a moditication providing fora change of the inclination of the stripper or receiving fingers during the first part of their movement from the cylinder in those cases where the proportions .of the machine will not permit ofthe stripper-fingers having sufiicient inclination as they lie against the cylinder, when receiving the sheet, to propel the sheet and keep it in contact with the stripper or receiving lingers during their outward motion. Fig. 4 is an end elevation of the parts shown in Fig. 3, partly in section.

In said iigures the respective parts of the machine are indicated by letters, as follows:

A A are parts of the main frames. B is the impression-cylinder; B', the type-bed, B2, the ink-table; B, the forni-rollers, and b the cylinder-grippers; B", the bed-rollers; B5, the bed-roller ways, and K the feed-board.

C C are a pair of brackets attached to the frames A A. The upper horizontal members of these brackets forni guides in which slide two toothed racks, G'. Secured to the racks C', Figs. l and 2, are two brackets, c, which carry a cross-bar, c', to which are secured the lower ends of the stripper or receiving fingers E is the receiving-board, and Easheet-stop or series of stops against which the leading edge of each sheet slightly inipinges as the sheets iioat downward in the inclined position in which each sheet is left by the recession of the stripper or receiving iingers.

IOO

T is a shaftjournaled in the main fiarnesQthese parts ofthe frames being broken away in Fig. 1) just in front of the cylinder carrying a series of tape-pulleys, T2, and T is a similar shaft journaled in the brackets C, carrying a similar series of pulleys, T3. Upon these two series of pulleys run a series ot' tapes, T, the respective positions of said shafts being such as to bring the upper sides of thetapes slightly above the stripper-fingers when in position to receive the sheet from the cylinder. The shaft T and the tapes T'1 are driven by gearing with a suitable gear upon the cylinder` B, (not showii,)so as to drive theni in the proper direction to convey the sheet downward parallel with the stripper or receiving fingers.

A shaft, d,journaled in the brackets C, has secured to it at one end a pinion, d', the pinion al'l on the saine shaft engaging the sliding racks C. On a stud, f, secured in one of the brackets C, freely runs a gear-wheel, f', which engages the pinion d. Secured to the gearwheelf is apinion, f2, also running freely on the studf. Oscillating upon a stud, f3, secured in the lower part of one of the brackets C, is a sector-gear lever, ft. Upon a stud, g, securediii the traine A, oscillates a lever, g', carrying upon its lower end a roller, g2. The lower ends of levers g and f* are connected by a rod, g3, pivoted to each lever. The roller g2 engagesa suitably-formed groove in a earn, g4. The cani g is carried on a shaft, g5, journaled in the frames A A', to which shaft motion is imparted from any suitably rotating part of the niaehine, (not sliown,) so that said cam may make one revolution for each sheet printed.

Secured in two standards, S, projecting upward from the brackets C, is arod, S. Adjustably secured to this rodi)l are one or more sockets S2. The sockets S2 may be adjusted angularly or laterally upon the rod S. Adj ustably secured to each socket S2 is aslotted rod or strip of metal S3. This rod or strip S3 is so made and attached to its socket S2 that it may be protruded from the socket any desired amount, so that t-his adjustment, together with the angular and lateral adjustment of the socket S2 upon the rod S', will permit of the free end of the rod S3 being so placed as to nieet any part of the sheet desired, or a sheet of any size. The free ends of the rods S may be tipped -with rubber or any substance suitable for offering a slight frictional resistance to the upper surface of the sheet. The rods S" are shown in Fig. 1, in one position in full lines and in two other positions in dotted lines. In Fig. 1 also the stripper or receiving lingers D are shown in dotted lines at the ends ot' their outward motion, illustrating the positions of the parts when rods S3 iinpinge upon some unprinted spots on the upper side of the sheet, to prevent, by their frictional contact, the further progress of the sheet in the direction in which it was moving. The tapesTL are-not essential to this invention; but may be used when the angle of the stripper-fingers with the horizontal is so small as to prevent the ruiming of the sheet freely down the stripperlingers.

Referring now to the modication shownin Figs. 3 and 4, the stripper or receiving 1ingers D are secured to a rock-shaft, l1, instead of to a bar, o', (shown in Figs. 1 and 2,) said rock-shaft being journaled inthe brackets c,- and on one end of the rock-shaft h is secured a lever, h', carrying a roller, h2. which engages an incline, 71.3, formed upon one of the brackets C, so that in cases where the inclination of the stripper or receiving lingers D, when first receiving the sheet, is not sufficient, if thereafter moving without change of angle to cause the sheet to adhere to the stripper or receiving fingers by the resistance of the air, said lingers will, during a short first part of their motion, be carried to agreateranglc sufficient to securely hold the sheet in contact with them, as shown in dotted lines, Fig. 3.

The operation in detail is as follows'. The sheet is received from the top of the cylinder upon the stripper or receiving fingers D, as shown at L, Fig. 1, the stripper or receiving fingers D remaining at rest while the roller g2 is passing through a concentric part of the groove in the cam g4 until the sheet has passed entirely down and upon the stripper or receiving fingers D, at which time the cain gt will have arrived in such, a position that its further rotation will carry the roller gZ to the left, Fig. 1; and, through the instrumentality ofthe rod g, sector-leverf, intermediate inultiplying-gears fj`2, the pinion d, the shaft d, the pinioiis d2, and the racks C', the stripperfingers will be carried to the right without change of angle, as in Fig. 1, or with altered inclination during the lirst part of their niovenient, and thereafter without further change of angle, as in Figs. 3 and 4, until they arrive in the position shown in dotted lines, Fig. 1, at the extreme right.' Upon arriving at this position the rods S3 will impinge upon some imprinted spots on the face ol" the sheet, hold- .ing it at rest at the saine time.

the under side of the sheet as the sheet passes between the stripper or receiving fingers prevents it froni following the said fingers upon their return motion and allows it to drop gently down upon the pile on the receiving-board E, being thereon left by the stripper or receiving fingers D upon the commencement of their return motion in the saine inclined position they themselves occupy. The tendency of the sheet, upon being released from the pressure between the ends of the rods SS and the stripper or receiving fingers/D, will be to again have a slight motion to the right, Fig. 1, sailing down upon the air as upon an inclined plane. To insure an even pile of paper, therefore, the sheet-stops or series of stops E are IOO provided to arrest this small residual motion of the sheet through the air, which motion, however, is never| sufficient to cause buckling in the thinnest paper, while it provides effectual means of correcting any little variation in position of the respective sheets as received upon the stripper or receiving fingers and efi'ectually secures an even pile upon the receiving-board E.

It is obvious that the inclines 7L, Figs. 3 and ii, may be so formed as to be a continuous incline throughout the whole length of thc motion of the fingers I), so that the angle ofthe fingers D may be gradually changing throughout the whole of' their travel until they arrive at the termination of' their outward movement at the desired angle, and also that the incline h may be made adjustable so as to vary the maximum angle through which the fingers may move. It is also obvious that, by aid of the tapes T, the fingers D may primarily occupy a horizontal position, or may, indeed, beinclined somewhat toward the cylinder while receiving the sheet, as may be best suited to meet special cases, depending upon the diametor of impression-cylinder.

I do not confine myself to the mechanism shown for imparting a reciprocating motion to the stripper or receiving fingers D, as this 1 may be effected in various ways, as best suited to the various forms of cylinder press; but,

Having thus fully described my said improvements as of my invention, I cla-iml. In a sheet-delivery for cylinder printingpresses, a set of inclined stripper or receiving fingers, D, in combination with mechanism for reciprocating said fingers in a horizontal plane, substantially as described, whereby a sheet deposited upon said fingers is held in contact therewith by the resist-ance of the air on the upper s ide of the sheet during` the travel of said lingers in one direction, and the sheet released from contact therewith by the resistance of the air upon the under side of said sheet upon the return travel of said fingers in an opposite direction, substantially as and for the purposes set forth.

2. In a sheet-delivery for cylinder printingpresses, a set of stripper or receiving fingers, as D, in combination with mechanism for reciprocating said lingers in a horizontal plane, and varying the angle of inclination of said fingers .from the horizontal during their reciprocation, substantially as described, whereby a sheet deposited upon said fingers is held in contact therewith by the resistance of the air against the upper side of the sheet during the travel of said fingers in one direction, and said sheetreleased from contact therewith by the resistance of the air upon the under side of' the sheet upon the return travel of said fingers in an opposite direction, substantially as and for the purposes set forth.

3. In a sheet-delivery, delivering the sheet by means of' a set of' inclined reciprocating stripper or receiving lingers for the reception of the sheet on their upper side, in combination with said fingers, means for varying the angle of said stripper or receiving fingers, consisting of a rock-shaft, as h, to which the said fingers are secured, an arm, as 717, secured to said rock-shaft, carrying aroller, as h2, said roller engaging a suitable incline, as h3, subst-antiall y as and for the purposes set forth.

4. In a sheet-delivery for cylinder printing presses, in combination with a set of inclined reciprocating stripper or receiving fingers, as I), a series of supporting-tapes, as Tt, whereby the sheet is supported from contact with said inclined ngers while passing down or` upon them, substantially as and for the purposes set forth.

5. In a sheet-delivery for cylinder printingpresses, delivering the sheet by means of a set of inclined reciprocating stripper or receiving fingers, as D, the combination, with said inelined reciprocating lingers, of a delivery or receiving board, as E, placed under said inclined reciprocating fingers when in their outward-assumed position, substantially as and for the purposes set forth.

(i. In a sheet-delivery for cylinder printingpresses, delivering the sheet by means of a set of inclined reciprocating` stripper or receiving fingers, as D, in combination with said lingers a series of adjustable frictional sheetstops, as S, whereby the upper surface of the sheet at the termination of the outward excursion of said inclined fingers is impinged upon by said stops, the sheets moment-urn overcome and its motion arrested simultaneously with the arrival of the said lingers at the termination of their outward travel, substantially as and for the purposes set forth.

7. In a sheet-deliveryfor cylinder printingpresses delivering the sheet by means of a set of inclined reciprocating stripper or receiving fingers,as I),in combination with said fingers, an abutting sheet-stop or series of stops, as E', whereby the residual motion of the sheets is arrested,substantially as and for the purposes set forth.

8. In a sheet-delivery for a cylinder printing-press delivering the sheet by means of a set of inclined reciprocating stripper or receiving fingers, as D, the combination, with said iingers, of a setof frictional adjustable sheet-stops, as S, and an abutting sheet-stop or series of stops, as E, whereby both the forward momentum and residual mot-ion of the sheets is arrested, substantially as and for the purposes set forth.

9. In a sheet--delivery for cylinder printingpresses, in combination with an impressioncylinder, as B, delivering the sheet from the top of said cylinder, a series of reciprocating inclined stripper or receiving fingers, as D,for receiving and discharging the sheets from said cylinder,substantially as and for the purposes set forth.

l0. In a sheet-delivery for cylinder printingpresses, in combination with an impressioncylinder, as I3, delivering the sheet from its top, a series of inclined reciprocating stripper IOO IIO

ISO

or receiving iingers, as D, and a set of receiving-tapes, as T, whereby the sheets are removed froni said cylinder,substantially as and for the purposes set forth.

11. In asheet-delivery for cylinder printingpresses, in combination with an impressioncylinder, as B, delivering the sheet from its top, a series of inclined reciprocating stripper or receiving fingers, as D,a set of supportingtapes, as T4, and a series of frietional adjustable sheet-stops, as S3, whereby the sheets are removed from said cylinder and their inomenta arrested,substantially as and for the purposes set forth.

12. In a sheet-delivery for cylinder printingpresses, in combination with an impressioncylinder, as I3, delivering the sheet from its top, a series of inclined reciprocating stripper or receiving fingers, as D, a series of supporting-tapes,as Tia series of adjustable frietional sheet stops, as S3, and an abutting sheet-stop or series of stops, as E', al1 constructed and operating,substantially as and for the purposes set forth.

13. In a sheet-delivery for a cylinder printing-press, in combination with an impressioncylinder, as B, delivering the sheet from its top, a series of inclined reciprocating stripper or receiving ngers, as D, a set of supporting tapes, as T4, a set of adjustable frictional sheetstops, as S3, and an abutting sheet-stop or series of stops, as E, and a receiving-board, as E, all arranged and operating, substantially as and for the purposes set forth.

Y 4JOHN T. HAVKINS.

W'itnesses:

ELisHA T. J AcKsoN, J. F. HALEY.