US2375793A - Printing press - Google Patents

Description

y 1945- E. KIDRICK EIYAL' PRINTING PRESS 3 Sheets-Sheet 1 Filed Jan. 11, 1943 E. F. KlbRlcK ET AL 2,375,793

PRINTING PRESS "Filed Jan. 11, 1945 3-Sh eets-Shee t'2 VIII/117' 5 I gINVEIJTORS May 15, 1945.

E. F. KIDRICK ETAL PRINTING PRESS Filed Jan. 11, 1945 3 Sheets-Sheet 5 Peieniedl Megrecs srsrss were.

rem 1:5.

PRN'MNG PRESS Emmett 1F. Kidrlck and Walter 61-. met,

(Glorified tinder the not oi Mercia 3, N53, as amended April 3%, 1928; 37% l}. G. i?)

3 (Cldims.

invention relates generally to printing es end more perticnieriy to o. printing press for ,mnting title bloclns on tracing cloth, paper or other material of any length.

object of the invention is the provision in s. p lilting press of so scared impression cylinder. efoie over racks, and a com mechanism for idienIE-dild lowering the reeks and cylinder away from towards the work.

.Lrotl'zer object of the invention is to provid means whereby the ink roller mechanism is driven the impression cylinder.

is lonelier obieci; of the invention is to provide 22 operated mechenism for securing e. drawing press,

Fig. 2 is o. section on -she line 2-2 of Fig. l, v is a, side elevation of the mechanism ror n'eeing the drewsheet, make-ready and packg. is 9. section on the line 3- 5 of Fig. l, g. is a section on the line 5-5 of Fig. 1, mg. o a. detailed View of the grippe fin er niecheiiism.

Q l is e. detail showing. the inking roller driving mechanism, and

Fig. e is on end view of Fig. 7.

raised from the printing press nee. surmise guides i? (Fig. 1) positioned along and secured to the aprons further essist in maintaining the racks in proper walleiism.

The form cylinder id is preferably hollow. and may be of any desirable size, although it has been found that fourteen inches in diameter and forty inches in length are the optimum dimensions for the class of Work for which the press is designed. The cylinder is webbed inside at three points throughout its length-end is closed at the ends by welded discs. Geared Wheels ii; are bolted to the and discs and engage with she rocks ill for movement of th cylinder there along, and in this movement the cylinder is guided against axial displeoemen; by flanged wheels 59 bolted through the geared wheels ld to the ends of the cylinder, these flanged wheels riding on guide rails 29 etteched to the rocks 86 from the under sides by counter-sunk bolts (not shown). By referring more particularly to Fig. 5, it will he noted thettbe rocks is themselses ere L-sheped, and that the rails iii, which have their upper outer sides slightly bevelled to receive the flanges on the wheels is, ere scored on the horizontal portions of the L-shsped reeks. The form cylinder is propelled along the rocks by cranks 2i, one at each end of the cylinder; the cranks being keyed a. shaft 32 extendin through and suitably attached to the cylinder so that the two members will turn together. The

' shaft is supported in bearings 22 carried by standerds 25 positioned near the ends of the cylinder.

Referring more particularly to Fig. 1 of the drawings, the numeral iii designates the bed of e, printing press, preferably constructed ofribbed cast iron milled on the face and cast integrally with side aprons it end end members (not shown). The bed is supported by a. pluralit of legs l2 ihei' are suitably cross braced to provide stability. The longitudinal sides of the press Md The form cylinder is cross-scribed in any desired manner at regular intervals so that a. metal or rubber printingplate 25 may be accurately adjusted on the cylinder; Siops 25, that may be adjustable along or fixed at proper places on the racks i i, prevent the form cylinder from over-running the racks.

The standards 26 support two composition inklng rollers 27 and a hollow oscillating ink distribution roller 28, all of which are mounted in adjustable bearings 29 at each end of the shafis $6 for the inking rollers and shaft M for the distribution roller. The inking rollers derive their rotation through expansion rings 32 therethat the cylinder movable therealong may be on engaging with fricfional hauls 33 carried by the cylinder, and rotarymotion is imparted or turn to the distrlbution roller through the expension rings 32. The oscillatory movement of the distribution roller is obtained by means of 'a cam Slpositioned at each end of the roller engaging with stefionary cam followers 35st tached to orackets 38 secured to the standards 24, as may be seen more clearly in Fig. 2. If it is desired to move the distribution roller at times when thecylinder is not ,being operated to obtain additional or a more evenly distribution of ink over the inking rollers, it may b turned by hand through a crank 31 secured to the shaft 3!. Also, there is provided a bail 38 with hand grips 39 so that the distribution roller may be carried about or wiped over an inking pad without soiling the hands.

The standards 24 are held in proper spaced relation by two lower tie-rods 4B and an upper tie-rod 4!, the latter being more clearly seen in Fig. 2. The lower tie-rods have their ends mounted in arms 42 that 'may' be made integral with or attached in any suitable manner to the standards 24, whereas the upper tie-rod is connected to the standards by nuts 43. Rollers 44, mounted on thelower tie-rods "and which are operable over the upper surface of the guide rails 20',"support'the weight of the impression cylinder assembly, and are so positioned with respect to racks I4 that positive engagementwill be maintained at all times between the geared wheels 18 and the racks. By this arrangement, the form cylinder is easily moved,yet slipping of the cylinde'r when in operation is reduced to a minimum.

In the drawings the form cylinder and paper 45, secured under gripper fingers 46 are positioned for the impression revolution with the racks l4 tight in their seats in angle l3. At the end of this impression revolution the cylinder is raised preparatory to its return or non-impression revolution. This lifting or raising is accomplished by a mechanism, the details of which are more clearly shown in Fig. 4. A crank or lever 41 operates two parallel shafts 48, one below each end of the press bed, that are connected to oscillate simultaneously by rods 49 having a pivotal movement in one end of links 50, the other ends of which are fixedly secured to the shafts 48.

Cam followers 5! have one end riding over cams 52 mounted to turn with the shafts 48, and the other and engaging with the under side of the racks l4, so that as the full sides of the cams. are uppermost the followers will urge the racks upward,.freeing the form cylinder from the now Printed pap r- Itisto -be understood that there-m area-became and followers at each end of the shafts 48 to insure equal raising of the racks, and that there-are other shafts and cams intermediate of those illustrated, if it is desired.

Thus, by turning the crank-or lever 41 in the appropriate direction the racks i4 may be raised or lowered, as the case may be, to be guided in movement by the dowel pins 15, as previously stated.

The cylinder now being raised, it is started on its return or unimpression revolution. As it approaches the starting point of its impression revoiution the rear one of the rods 49 (or left one as the drawings are viewed) contacts with and raises a finger 53 (Fig. 6) fixedly secured to a make-ready and packing, shown in the drawings 'as a unit 59. Spring depressed clamp-bars 00 fit into the grooves and firmly hold the unit therein. When seated in operative position in the grooves, the upper surfaces of the clamp bars should be flush with the top surface of the unit to eliminate uneven surfaces for the paper to rest on. When it is desired to remove the unit, the machine operator steps on foot pedals 4i, fulcrumed in supports 52, conveniently placed on the floor under the press. These pedals operate lift bars 63 pivotally connected to arms 64 secured to shaft 65 journaled in the guides II. The arms 64 contact with and raise clamp bar pins 68 against the pressure of springs 41. Of course, when pressure is removed from the pedals, the springs restore all parts to their normal position.

It will be seen from the above description that there has been provided sprinting press particularly adapted to print the title block on paper of any length used by draftsmen.- While the in vention has been designed and described as a title block printer, it is to be understood that its use need not be restricted to this type of printing,'as its possibilities are limited only to-the format of the printing plate attached to the form cylinder. v

It will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of our invention and that various changes in details of construction, proportion and arrangement of parts may be made .within the scope of the appended claims and without sacrificing any of the advantages of our invention.

The invention described herein may be manufactured and used by or for the Government of the United States for governmental purposes wihout the payment to us of any royalty thereon.

What is claimed is:

1. In a printing press, in combination, a stationary bed; a form cylinderlmovable over the bed, elevatable racks on which the cylinder moves,

guide rails on said racks, a frame supporting said gaging with theracks, guide rails on said racks,

a frame movable on said guide rails having bear ings supporting said cylinder, and means for raising the racks to change the cylinder from an impression to a non-impression position.

3. In' a printing press, in combination, a stationary bed, a form cylinder movable over the bed, elevatable racks on which the cylinder moves,

' guide rails supported by the racks, a supporting shaft 54 mounted in bearings to raise the gripper fingers 46 freeing the printed paper. A coil spring 56 is suitably attached to the shaft and one of its bearings urges the grippin fingers to normally exert pressure on the paper to hold it against disarrangement during the printing operation. A hand grip 51 is attached to the shaft 54 so that the gripper fingers may be manually moved.

In Fig. 3 there is shown'a mechanism ior holding down the drawsheet, make-ready and packing during the printing operation. Extending lat.

frame for the cylinder movable along the guide rails, means for manually elevating the racks to raise the cylinder to a non-impression position.

4. In a printing press, a stationary bed, sprons at the sides of the bed connected thereto by right angled portions, gear racks mounted in these angled portions and having a right angled groove along their outer edges, guide rails mounted in said grooves, cam followers extending through bores in the horizontal faces of the angled portions connecting the aprons to the bed, camshaits mounted throughthe aprons below the bores, cams on said shafts coacting with the cam bottom of said grooves, spiral springs about said followers, hand-operated means for actuating pins compressed between the ends of said'pins said shafts to raise and lower the racks. a and the bottom of the bed for holding said bars 5. In a printing press as claimed in claim 4, resiliently within said. grooves, foot-operated dowel pins mounted rigidly in the horizontal faces n5 meanswacting against the bottom of said pins to of said angled portions slidable in correspondraise the clamping means and release the sheets. ing bores in said racks to guide them vertically '7. In a printing press, means as claimed in while being raised and lowered. claim 6 wherein the foot-operated means can:-

6. In a printing press, a stationary Foed, clampprise a foot-operated lever,'.a rod pivotally coning means for clamping the edges oi? work sheets 10 nected thereto and also pivotally connected at on the bed comprising cylindrical grooves runits other end to lever means for raising saidpins. ning across the bed, correspondingly shaped bars EMME'I'I F. KIDRICK. mounted on pins passed through holes in the WALTER G. MILLER.

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