US1283392A - Printer's roller. - Google Patents

Description

Patented Oat. 29

F.. HLWOLEVER.

PRINTERS ROLLER.

APPLICATION FILED Aus.4. 1915.

L www A ramer ernten,

FRANKLIN H. WOLEVER, 0F CHICAGO, ILLINOIS, SSIGNOR TO IDEAL ROLLER COM- PANY, OFIGHICAGO, ILLINOIS, A. CORPORATION OF DELAWARE.

PRINTER'S ROLLER.

messes.

Specification of Letters Patent.

Patented @et 29, 191%.

Original application led August 18, 1913, Serial No. 785,367, (now Patent 1,161,756.) Divided and this application led August 4, 1915. Serial No. 43,546.

To all whom t may concern.' l Be it knownr that I, FRANKLIN H. Wei,- EVER, a citizen of the United States, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printers llollers; and I do hereby declare that`the following is a clear, full, and exact description thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form par-t of this specification.

rlhis invention relates to a novel compound roller for printing presses, type writ# ing machines, clothes wringersl and other uses, and the invention consist's in the matters hereinafter set forth and more particularly pointed out in the appended claims.

A roller embodying my invention embraces a central core of high resiliency and a preferably outer face layer of tough exterior `formed on the core, said core and -face layer being composed largely of vulcanized oil. o

A roller embodying my invention and constructed in accordance with my novel process is especially adapted for use as a die.

tributing roller for printing presses, in which use itis subjectedto wide ranges of temperature and humidity, and wherein the jrequirements` are -for a rollerwhich will retain its contour anda uniform hardness under -all practical conditions of use and from which ink may be rapidly and completely removed.

Inasmuch as the conditions of use of a printing press roller are, perhaps, more severe than will be found in any other uses lof such rollers, emphasis is hereafter made to those qualities which especially it the roller for printing pressy use and to comparison of my improved roller to known rollers.

Heretoforeyarious attempts have beenv made to produce distributing rollers for printin M1 esses of .a character to withstand the varia the rollers and variableness 'in diameter both when in use and when stored in the racks;

and also of a character to permit the ink to be readily and completely removed there from after use. Such efforts, so far as I am aware,.have not resulted in a roller possessing thecharacteristics desired.` Consequently, the ink distributing roller of a printlng press has` presented "and now presents a serious problem in practice.

vide a roller of such nature and characteristics that it will not absorb moisture from the atmosphere under relatively high humidities, such as will tend to Fcause the roller to become larger in diameter and softer in teX- ture, and which, on the other hand, does not tend to lose its moisture when operating in dry temperatures, such as would cause the roller to shrink and harden; either of which conditions will render the roller uniit for its intended use. By producing a roller in which the interchange of moisture from the atmosphere to the roller, and vice versa, is minimized, I am enabled to avoid distortion and variableness of size of the roller, which occurs where such interchange is appreciable or substantial. Moreover the absorption or elimination of moisture to and from the titl) roller, respectively, does not occur uniformly to be aectedby inks ordinarily used in l printing processes, and which, therefore, may be kept in cleanly and usable condition.

Another object of the invention is to provide a roller which, when operated at high speeds and over long periods of time, will' face layer is tough and homogeneous. It is desirable in order to produce this tough or homogeneous outer or face layer that, after the material has been poured into the mold,

, and before it solidifies, all the air, gas and moisture or as nearly as may be, shall be driven therefrom. The roller face is, therefore, anhydrous so that it will not become deformed or shrunken or hardened, by elimination of moisture, and said material possesses no affinity for moisture, s0 that the roller will not become deformed, enlarged and softened by the absorption of moisture. An advantage realized in driving the air and moisture from the outer layer resides, not only in making the layer moisture-proof, but it is also valuable because the surface itself is thereby free from air holes and like irregularities.

The roller possessing the characteristics above specified may be produced by the process set forth in my application Serial No. 785,367, filed Aug. 18, 1913, now U. S. Letters Patent 1, 161,756, `granted onthe 23rd day of November, 1915, from which the subject matter of this application has been divided. Said process as disclosed in said patent, consists essentially of the steps of first lining the roller mold with a suitable fusible lining material, thereafter reaming the lining to the desired interior diameter, thereafter forming against the smooth wall of the lining the outer or face layer of the roller and thereafter pouring within the hardened o1 set face layer. the material to constitute the body or core of the roller, the roller stockor shaft being centered in the mold before the pouring operation..

In thef drawings are shown the essential elements of an approved form of apparatus for producing my novel roller, wherein- Figure 1 is an axial section of the mold afterit has been lined.

Fig. 2 is an axial section of the mold showing a reaming device for reaming the lining.

Fig. 3 is an axial section of the mold after the face layer of the roller has been formed against the lining.

Fig. Lfis an axial section of the mold in upright position, with the shaft centered there'in, and after the core material has been poured. Y

Fig. 5 is a perspective view of the finished roller.

Fig. 6 is a cross section thereof.

The roller shown in Figs. 5 and 6 comprises a central body or core 10 made of a suitable resilient material, and a face layer 11 which surrounds and is bonded to the core and is composed of a homogeneous material, relatively tougher than the core and free from air holes and moisture Iand anhydrous in character. The material from which the core is formed may be of any suitable vulcanized oil, such as corn oil. The face layer 11 of the roller may be made from the same general character of oil although treated somewhat differently to produce a tough, homogeneous smooth outer face free from air, gases and moisture, for instance, when the core is made of vulcanized corn oil compound, the face layer` may be made of a vulcanized linseed oilcompound. 12 designates a stock or shaft which extends centrally through the roller and extends beyond 'the ends of the'roller toconstitute the bearing member for the roller.

The apparatus'shown in the drawings for making the roller consists of a mold 14 fitted 9 with a hot water or steam jacket 15 and with removable caps 16, 17. The cap 17 has an -axial extension 18 to constitute a central bearing fo-r the mold in a centrifugal machine. The mold may be rotated through the-means of hollow lugs 19 in the cap 16 which are engaged by driving lugs 20 attached to a disk 21 constituting part of the driving device ofthe centrifugal machine. The axial extension 18 of the-cap 17 is provided with a trough 22 through which material is poured into the mold. A, series of 'holes 23 may be provided in the cap 16 to lpermit gases to escape from the mold during the molding operation of the roller face layer.

The operation of producing the roller con`- sists first of coating the caps 16, 17 with liquid paraffin or the like and inserting them into the ends 0f the mold. Thereafter the mold is centered in a centrifugal machine with the trough22 opening upwardly. Thereafter the proper amount of hot paraffin or other suitable lining material is introduced through the trough into the mold, after which the mold is rotated to throw the paraiin or lining material outwardly against the mold walls to form a lining 25 of uniform thickness, the lining solidifying during the rotation of the mold. Thereafter the mold is lifted from the centrifugal machine and the endcaps are removed and the mold placed in a reaming machine such as is shown in Fig. 2. 4Said machine consists in part of |parallel blades 26, 26 which are pivoted to cross arms 27, 27 that are in turn pivoted to the shaft 28 of the reaming machine. One of the blades is extended at one end for connection toa nut 29 which is screwthreaded to the shaft 28, Athereby the two blades may be moved inwardly and outwardly in parallel relation to adj ust'them to cut away more or less of the lining material and to produce a lining of the desired interior diameter.` The shavings are drawn out 'from the reaming-machine through an exhaust pipe 30.

After the lining 25 has been reamed the mold is removed from the machine and the end caps replaced. Thereafter the mold is again set up in the centrifugal machine, and the material for forming the outer face layer, prepared by a partial vulcanizing process, is mixed with a further vulcanizing agent such, for instance, into the mold after the mold is rotated at a suitably high speed until the compound has been thrown outwardly against the lining 25 to form the shell or face layer 11.

After the solidilication of the face layer 11 the mold is taken' from the centrifugal machine and the end caps removed and the) mold is then set upright, as shown in Fig. 4, to receive the material which' constitutes the core 10 of theroller.` Before the core material has been poured into the tubular face layer, the roller stock or shaft l2, fitted with a head bushing 32 and with a foot bushing 33 is centered in the mold inthe manner shown in Fig. 4, said bushings fitting in upper and lower end caps 34, 35 respectively.

he upper cap has an opening or openings through. which the iuid core material is poured 1nto the mold. When the Huid core material is poured, the heat thereof serves to slightly fuse the inner surface of the face layer, so that upon final solidication of the core a bond is formed between the core and face layer to hold the roller elements in fixed relation to each other. Before the core is entirely solidified, the frothy top of the material may be scooped out and more of the material poured in so that the core structure shall be lirm throughout. v

Thereafter, the completed roller is withdrawn from the mold. Before such drawing operation steam or hot water may be introduced into the steam jacket through an induction pipe 36 which, through the jacket` is exhausted through an exhaust pipe 37. The heat of the steam or water is maintained until the paraflin is melted or partially melted. The top cap and bushing are thereafter removed and the roller is then free to be lifted out of the mold. While the roller compound is still as sulfur chlorid and is poured throughv the trough 22. Thereafter circulating It 'is' to be understood that reference to vulcanization is intended to mean the hardening or partial hardening or solidiiication of the oil, without regard to the degree of hardening. -For example, this vulcamzation may be carried to a point where the oil is as hard as hard leather, or to a point where it is just solid enough to withstand deformation by gravity, or to any point therebetween.

I desire it to be understood that the invention is not limited to the specic elements herein set forth, except as such elements aremade the subject of specific claims, but that it is my intention to claim all ofnovelty inherent in the roller herein described.

I claim as my invention l. A printers roller for the forth composed of vulcanized oi l 2. A roller for the purpose set forth composed of vulcanized oil having a surface which is more highly vulcanized than the interior.v

3. A 'roller for the purpose set forth composedof vulcanized oil, having a surface which is tougher than the interior.

4. A compound roller composed of an elastic vulcanized oil core and a face layer of a more highly vulcanized tough, homogeneous material bonded to the core.

5. A roller for the purpose set forth made of a vulcanized oil and having a resilient body and a tough, homogeneous face free from gases and moisture and having no afinity for moisture bonded to said body.

6. A roller for the purpose set forth comprising a core made of a vulcanized oil and a face layer made also of vulcanized oil and 1purpose set more highly vulcanized than the core.

7. A compound roller comprising an outer face layer composed of a tough vulcanized oil compound, and a more resillentcore backing of substantially the same material.

8. A'compound roller comprising an outer face layer com-posed of an -oil compound mixed with a. vulcanizing agent, and a core backing of vulcanized oil of resilient texture.

9. A compound roller comprising an outer layer composed of an oil compound mixed with a vulcanizing agent, and with a core backing of vulcanized oil.

In testimony that I claim the foregoing as my invention, I aflix my signature in the presence of two witnesses, this 20th day of March, 1915.

FRANKLIN H. WOLEVER.

Witnesses:

G. E.` DoWLE, WILLIAM L. HALL.

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