US637603A - Printing-press. - Google Patents

Description

- No. 637,603. Patented Nov. 2|, I899.

E. HETT. v

PRINTING Pnsss. (Application filed am. 21, 1899.)

4 sham-sheet (No Model.)

S IINVENTOR WM WITNESSES ATTORN J Tn: Momma FEYERs 0o, PuoTo-umou wmumcmn, a. c.

E. HETT. PRINTING PRESS.

(Application filed Jan. 21, 1899.)

Patented Nov. 2|, I899.

(No Model.)

4 Sheets-Shut 3.

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Patented Nov. 2!, I899.

E. HETT. PRINTING PRESS; (Application filed Jan. 21, 1899.

(No Model.)

INVENTOR WW BY W ATTORNEYe/ WITNESSES me "yams PETERS co, PNOYO-LIYHQ. WASHINGTON 04 c.

UNITED STATES PATENT OFFICE.

EDWARD HETT, OF NEW YORK, N. Y.

PRINTING-PRESS.

SPECIFICATION forming part of IlettersPatent No. 637,603, dated November 21, 189 9. Application filed- January 2 1, 1899. Serial No. 702,896. (No model.)

T0 or whom, it may concern.-

Be it known that I, EDWARD HETT, a citizen of the United States, and a resident of New York, (New Dorp,) in the county of Richmond and State of New York, have invented certain new and useful Improvements in Printing-Presses, of which the following is a specification.

My inven tion relates to rotary sheet-presses.

It has special reference to and, is especially valuable in lithographic sheet-printing presses.

It has for its object to improve the printing member or members. of such presses; to do away with the use of cumbrous and heavy printing-surfaces, especially the fiat cumbrous and heavy stone surfaces heretofore employed in lithographic sheet-presses, and to substitute therefor rotary tubular printing: surfaces circumferent-ially unbroken and continuous in printing-surface, light in weight, capable of being placed in or removed from the press readily, economically, and without injury to the press or to the printing-surface or to its support, suitably supported, so as to be capable of accurate register during the printing operation; also, generally, to improve and simplify the construction and operation of such presses and to improve their efficiency and working capacity; also, to provide improved means for regulating the pressure between a printing-cylinder and the impression-cylinder; also, to provide improved means for removing and replacing printingcylinders, and, lastly, to provide improved means for operating the inking and dampening mechanisms.

My invention consists of the novel features of construction and combinations of parts herein shown and described.

I-Ieretofore it has been customary in the practical use of presses for printing upon sheets, and especiallyin presses for printing upon sheets in the lithographic manner, to use flat printing-surfaces, such as flat stones or fiat zinc plates. Such stones and plates are necessarily very heavy, cumbersome, and expensive. They are, moreover, wholly unfitted for use in rotary presses or in multicolor presses. In my improved device I employ one or more printing-cylinders, each consisting of an exterior hollow tubular form or upon it.

shell and an interior form-supporting device readily separable from each other and removable from the press, the former having an outer rounded printing-surface circumferentially continuous and unbroken, with an impression-cylinder larger in diameter than the printing cylinder or cylinders and having suitable impression-surfaces and intervening blank surfaces or depressed surfaces.

I have shown in the drawings of this case my improved device as embodied in a rotary lithographic sheet-press, although my invention in some of its aspects is not limited to the use of my improved devices in such a press.

I will now proceed to describe the preferred form of my improved device shown in the drawings, in which similar numerals in the different figures refer to corresponding parts.

Figure 1 is a longitudinal section through the middle of the press. Fig. 2 is a rear elevation, and Fig. 3 a side elevation, of the same viewed from the left. Fig. 4 is a diagrammatic view showing a number of printing-cylinders in position.

1 is the framework of the press; 2, the impression-cylinder; 3, the feeding-table, and 4 and 5 are delivery-tapes rotating upon wheels 6 and 7, respectively.

8 and 8 form a rotary lithographic-printing cylinder. This printing-cylinder consists of an interior supporting form-cylinder 8, with an exterior hollow printing-tube 8" mounted The printing-tube 8 is a hollow tube and has an outer smooth unbroken circumferentially continuous rounded lithographic-printing surface. It is shown, for example, in the following pending applications filed by menamely, Serial No. 537,582, filed February 7, 1895; Serial No. 568,179, filed November 7, 1895, and renewed January 20, 1899, Serial No. 702,845; Serial No. 735,445, filed November 1, 1899; Serial No. 735,446, filed November 1, 1899, and Serial No. 701,196, filed January 5, 1899. The printing-tube is slipped over a suitable interior supporting form-cylinder and is adj u stably secured there on and removable therefrom at will, and the whole device, consisting of the inner supporting form-cylinder and the outer printing-tube, can readily, economically, and safely be removed from the press and reinserted therein.

present invention will'not be furtherrde scribed.

16 is a swinging frame also pivoted upon shaft 10, supporting the usual damping-rollers 17 and adapted, as will be hereinafter described, to move the damping-rollersinto or out of operative position.

-18I.is a water-roller'mounted upon oscillating arm19, and adapted, as will be'hereinafter described, to carry waterfrom-water-fon ntain roller 20 in water-fountain 21 to dampingrollers 17.

-of tautness;

-26 -working in slots in:plate 26 and in the& framework of the-impression-cylinder andby;

Impression-cylinder 2hasa plurality of impression-surfaces. As shown in thedrawvings, it has two, 22 22, eachadapted in conjunction with printing-tube 8 to printasina rglesheet. Between these impression -surfaces are depressed surfaces 23. The impression-surfaces 22 22 have the usual rubber co'vering24, secured at one endby bolts and at the other moved upon a roller 25, by means of which it can be kept atthe proper degree At each end of the impressioncylinder'are-two rim-segments 26. Each of these rims extends only part way aroundthe periphery of the impression-cylinder and registerswith one ofthe depressed surfaces 23.,

It is-supported upon and forms part of a s'eg' mental plate 26*, which is secured to th-erim pression-wheel by bolts 26 and screws and nuts 26, passing through screwthreaded. opening 27 in'the framework of the impres-'- sion-wheel. These rims 26 engage with similar:

rimsiS upon the printing-cylinder 8 8 when the: depressed surfaces 23 are under it andprevent that cylinder from dropping downa ward at such times, By means of the-bolts:

means-of=screw bolts and nuts 26 working? in openings 27 rims 26 can be moved slightlyi' inward or outward-to compensate for varying thicknesses of the rubbercoverings 24 and;

the paper used, and thus tendto prevent jars, :and so that it will run smooth. 7

28ris a gear-wheel mounted upon thesh-aft of impression-cylinder 2 and having teethi =m eshing-with gear-wheel 29, mountedxuponi the-shaft of form-cylin'derSfor the purpose; of communicating motion'from the impresfl sion-cylinder tothe printing-cylinder. 1

30 30 are grippers forseizin g and holding the sheet upon theimpression-cylinder. Springs 31 fo-rce-the grippers to seize and :hold :the? sheet. Cam 32-upon theframework strikesg the end of the gripper as the gripper reaches it in .its revolution and releases the sheet, which is at once seized by grippers 34 on wheel 6a nd is drawn over that sheet onto delivery-tapes 4 and thence to delivery-tapes 5.

33 are curved arms to support the sheet as it passes beneath impression-cylinder 2.

=35-"35are-side guides to properly register the sheet.

36 is a stop to prevent the feeding of a sheet while the depressed surfaces are opposite to the printing-cylinder. Stop 36 is connected to-andis lowered and raised by rod 37, pivotally connected to stop 36 by arm 38 and carrying at its other end wheel 39, bearing against cam 40, the latter mountedupon the shaft of impression-cylinder '2.

Swinging frames 9 and '16,;carrying "the inking and dampening rollers, respectively, are swunginto andaout of operative position by the following-described mechanism:

41 is a hand-wheel mounted upon wormsh-aft'42, the worm upon the shaftengaging with worm-Wheel 43, mounted upon shaft 44:. 'Thisshaft 44 has at-its upper end a worm 45,

which meshes, wi-th teeth45 ,with a segment of worm-wheel mounted nponand integral with swinging frame 9. By turning hand- Wheeletl-one way or the otherframe9 is swung-up' ordown.

-46 is a hand-wheel 011 therear of-theipress and is mounted upon'a'shaft-47, which carries a-worm 4:8 at'its inner end. This worm engages with-worm-wheel 49 upon shaft 50. *Upon this shaft is an eccentric-51,'carrying rod 52,-the latter pivotally secured at 53 to (swinging frame 16.

As hand-wheel 46 is turned one way or the other swinging frame 16 is s'wungup or down.

'The mechanism forgiving a reciprocating motiontowater-roller 18 to cause'it'to-conveyx-water from water-fountain roller 20 to damping-rollers 17 is as-follows:

Securedto' arm 19 by spring 55 is' arm 55,

ipivotally connected to rod 54, the latter-adapt- "ed to work up and down in bearings 56 56 andicarrying wheel 57. 7 'Wheel 57 rests upon a cam-surface 58, whichhas ahigherlevel at :one end than the other, the two level surfaces being connected by an inclined' plane :sur'face. Cam-surface 58-rests upon-sliding bar63. A screw 64 secured in the sliding bar, passes through a nut securedto cam-surface 58.

-59 is-a bar pivotally secured to sliding bar 63 at one end and at the other end to arm 60,

the latter-being mounted on theshaft of gearnwhe'el 161. Gear-wheel 61 is driven bygearwheel62, mounted;uponthe'shaft of impression cylinder 2.

As these gear-wheels revolve sliding bar 63 moves backward and :forward, rod '54 rises and falls, and 'water- :10116118 oscillates between fountain-rol1er'20 and dampin-g-rollers'l7. The length of time d-uringwhich water-roller 18 makes contact -with water fountain' roller20 can bevaried -by:turning screw 6ito the right or left,-whi'ch causes cam-surface 58 tooccupy-a IIIOI'B'OI,

less forward or backward position upon sliding bar 63.

My improved device for removing and replacing the printing-tube or form-cylinder consists of the following-described mechan- 65 is a shaft having a crank-handle 65 at one end and gear-wheel 66 at the other. This gear-Wheel meshes with gear-wheel 67, fixedly mounted upon revoluble shaft 69.

68 68 are arms fixedly secured to shaft 69 and having each a bent finger 66 at its end encircling the ends of the shaft of form-cylinder 8. The ends of the shafts also rest in a bearing of which 70 is the bottom plate. Shaft 71 runs through an opening in plate 70 and is normally secured in that position by nut 71*. By unloosening that nut and turning crank-handle 65 form-cylinder 8 and printing-tube 8 can be raised into the position shown in dotted lines in Fig. 3, when the form-cylinder or the printing-tube, or both, can easily be removed by means of standard 75 or by any other suitable means. As these means form no part of my present invention, they will not here be further described or shown. By turning hand-wheel 65 in the opposite direction arms 68 will be lowered and any form-cylinder or printing-tube borne thereon will be brought into operative position.

71 is a shaft passing at one end through plate 70 and secured in that position by not 71 and being screw-threaded atits other end where it passes through the center of a wormwheel 72 and where it engages with screwthreads out upon the interior of the wormwheel. A hand-wheel 74 is mounted upon a worm-shaft 7 3, the worms of the latter engaging With worm-wheels 72. By turning Wheel 74 in one direction the pressure between the cylinder 2 and printing-tube S is increased and by turning it in the other the pressure is diminished, or the printingcylinder is entirely separated from the impressioncylinder, as when the pressis stopped.

Upon shaft 75" is mounted pulley 76, upon which runs belt 76 Gear-wheel 76 is also mounted upon shaft 75 and meshes with gearwheel 77 upon the shaft of impression-cylinder 2, the teeth of gear 77 meshing with the teeth of gear-wheel 78, mounted upon the shaft of cylinder 6. By this means power is communicated through pulley 7 6 to impression-cylinder 2 and cylinder 6. Gear 28 on impression-cylinder 2 meshes with gear 29 on form-cylinder 8 and drives the latter cylinder. Gear 28 also drives gear-wheels 79 80, and through them and gear 81 on ink-distributing cylinder drives the latter cylinder and through it the various inking-rollers by any well-known method of driving such inking mechanism.

It will be noted that in my improved press the printing-cylinder makes at least two complete revolutions while printing but one impression. Meanwhile the dampening and inking mechanisms are continuously operative. The printing-tube is thus dampened and inked twice as much as in the ordinary lithographic press and the printing is correspondingly improved.

In using my improved rotary printing-cylinder and printing-tube, with its continuous printing-surface, in a press for printing upon sheets it is necessary to use an impression cylinder with a circumference at least twice as great as that of the printing-cylinder, so

that a blank or depressed space upon the former will register with each alternate revolution of the latter.- Preferably an impression-cylinder is used with two or more impression-surfaces and with two or more blank or depressed intervening surfaces, so that a plurality of sheets can be printed at each revolution of the impression-cylinder. The working capacity of the press is thus increased and the impression-surfaces work more satisfactorily.

My invention is not restricted to the use of but one of my improved rotary printing-cylinderswith an impression-cylinder. As many printing-cylinders may be used with the impression-cylinder as the latter has impression-surfaces, and the number of the latter can be increased by increasing the size of the impression-cylinder. In such a press each printing-cylinder may be arranged, if desired, to print in a different colorfrom those of the other printing-cylinders. Sucha press is shown in Fig. 4. The press there shown is provided with four printing-cylinders, each preferably adapted to print in a different color from that of each of the other printing-cylinders. In this figure I have not shown the inking and dampening mechanisms and the driving parts of the press,omitting all of these and other parts for the sake of clearness. This figure is intended merely to form a diagrammatic sketch showing the manner in which more than one printing-cylinder can be arranged around the impression-drum in embodying my invention in a multicolorsheet printing-press.

By my improved devices the construction of rotary sheet-printing presses is simplified. The operation of such presses is improved and their efliciencyincreased. The printingsurfaces of such presses are greatly improved. The printing member or members thereof are easily removable and replaceable and interchangeable. A plurality of sheets may, if desired, be printed at each revolution of the impression-cylinder, and damping and inkin g mechanisms are made more efiective. My improved press, moreover, permits of the easy, economical, and safe insertion into and withdrawal from the press of printing cylin ders or tubes and of their accurate adjustment in the press for the purpose of accurate registering. It also provides simple and improved means for regulating the pressure betwenutheprinting and impression cylinders and 'also for operatin'gfthe:inking'and damp-i ling mechanisms.

My'invention in some of its aspects isap-i plicable to cylindrical relief plate-printing; as where a planographic or lithographic print- -ingcylinder'is after the design is transferred itoit by suitable means, as by deep etching developed into-a relief-prin ting cylinder with? which; no damping devices'would be necesr-l sary in the printing. My invention,-moreover, makes it more feasible to obtain exacti I register inprinting with more than one colori and more than one printing-surface at a;-

-ti1nethat is to say, in multicolor-printingand alsomore feasible to obtain such regis-= 'ter wherethe colors are separately printed? Moreover, the angular relationship of the printing and impression surfaces in their rolling contact when the latter is larger in' diameter than the former and intermittent printingaction when its surface is discontinuous, taken in connection with the removability and exact interchangeability of the printing-cylinders and their method of support, achieves a very clear and readilycontrolled and superior and economical character of sheet-printing.

WhatlI claim as new, and desire to secure .by Letters Patent, is'- :1. The combination in a rotary printing press, of aprinting-cylinder consisting of an interior form-supporting device and an 'exte-i rior removable and replaceable printin g-t.ube,: having a circumferentially continuous un-j broken printing-surface, with a circumferen- I 'tially-discontinuous cylindrical impressionsurface llarger in circumference than the;

printing-cylinder, substantially as set forth.; L2. The combination in a rotary lithographic v printing press, of a printing-cylinder consisting of an interior form-supporting device and an exterior removable and replaceable printing-tube, havinga circumferentially continuous unbroken 'l-ithographic printing surface, :with a. circumferentially-discontinuous cylindrical impression-surface larger in circumference thantheprinting-cylinder, substantially as setforth.

.3. In a press, the: combination with an impression-cylinder, of a printing-cylinder supported in movable bearings, screw-threaded shafts secured to said bearings,'worm'-wheels having screw -threaded openings through which thescrew-threaded portions of the shafts extend, a worm-shaft andgworms thereon-adapted to mesh with the wormwheels and means'for'turning the wormshaft, whereby thepressurebetween'the impression-cylinder and printing-cylinder may be varied or the two'cylinders may besepa- "rated, substantially as set forth.

4., The combination in a press with aswing ing frame adapted to carry the inking ordam pening rollers, 0f a rod secured to the swing ingframehaving a ringat its other end, an eccentric mounted upon a-shaftand adapted to turn within said ring, a worm-wheel on saidshaft, a worm mounted upon a wormshaft and engaging with said worm-wheel, and means for turning the worm-shaftwhereby the inking or dampening mechanism may be brought into orbe removed from operative position. I

In testimony whereof 'I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD HETT.

Witnesses:

EDWIN SEGER, GEO. W. MILLS, Jr.,

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