US1282922A - Device for securing printing-plates. - Google Patents

Description

E. E. NOVOTNY. DEVICE-FOR SECURING PRINTING PLATES.

APPLxc'ATIoN FILED' MAY`20, |916. y

Lg@ Patented @Qn-29, 19m

Snom/Hoz entre sanas raiser orrori.

EMIL E.v Novo'rEY, or RIVERSIDE, ILLINOIS, Assrelvon 'ro a. sroGnELL sroKEs, or' MoonEs'rown, NEW JERSEY.

DEVICE FOR SECURINGr PRINTNG-PLATES.

ASpecification of Letters Patent.

Patented @et 29, 1918.

Application filed May 20, 1916. Serial No. 98,912.

T0 all whom t may concern:

Be it known that I, EMIL E. NovorNY, a citizen of the United States, residing at Riverside, in'the county of Cook and State of Illinois, have invented certain new and useful Improvements in Devicesfor Securing Printing-Plates, of which the following is a specification.

This 'invention .rela-tes to certain novel and useful improvements in devices for fastening or securing printing plates in a proper position of registration on the printing press, the invention being adapted for use in connection with. either flat or lcurved printing plates. Wherel the invention is employed in connection with the flat'printing plates of a platen press, a separate saddle or base plate is used in conjunction therewith, but where my fastening device is used on a rotary or cylinder press, it can be applied directly to the cylinder of such press, that is, without the interposition of a Vseparate saddle or base plate, `if desired.

In carrying out my invention it is my purpose to provide a printing plate securing device through the agency of which the printing plate may be readily, quickly, conveniently and firmly secured to and removed from printing position on the press. Furthermore, in the present instance, Ihave shown my invention as employed in connection with printing plates provided with small bosses or projections formed on" the under side thereof and with which bosses or projections, certain locking or latching members, are adapted to co-act to insure th fastening of tle plate.

Such an' embodiment of the invention will enable the plateto be quickly and ac' curately adjusted? or registered in the proper field on the press, for as the dimensions or distances between the boss centers are fixed and determined, the positioning and seeming' of the plate on the press 'simply requires that the plate be properly registered with the portion of the press by which it is carried andt-hen locked in such registered position.

It is also my purpose to dispense with the use of securing screws, bolts and the like, which require time to manipulate in fastening and unfastening the plate, as with my invention a plate may be locked and unlocked on the press with av Vminimum expenditure of time and labor.v My invention also facilitates any make ready process which may be required, because of the ease with which the plate can be fastened and unfastened, and will also enable me to dispense with the use of register block and groove devices, register hooks and the like. l also aim to provide a device of this character which will embody the desired features of simplicity and eiiiciency and which may be readily adapted to any of the well 'known types of printing presses.

`With the above recited objects and others of a similarnature in view, my invention consists in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claims. l y

In the accompanying drawingsg Figure 1 is 'a cross sectional View taken through a portion of ya plate carrying cylinder of a printing press and showing a plate secured thereto by means of my inn vention.

Fig. 2 is a longitudinal sectional view of thesame on the line 2 2 of Fig. 1.

Fig. 3 is va detail perspective view showing the construction and arrangement of the bosses on the back of the curved printing plate.

Fig. 4 is a perspective view of one of the locking bars.

Fig. 5 is aj transverse sectional view taken through [a fiat printing plate and showing it secured to a flat saddle by means of my invention.

Fig. 6 is a; longitudinal sectional view taken onthe line 6-6 of Fig. 5.'

. Fig. '7 is a perspective "iewv of a portion ofthe lsaddle or base support for the plate partly taken away and showing one of the locking bars therein.

I will first describe the invention in its application to a curved plate adapted to be fastened on a cylinder, such embodiment of the invention being shown in Figs. l to 4,' inclusive Formed in the outer face ofthe cylinder,

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in alinement with each channel, is a row of sockets 1a spaced predetermined distances apart, say two inches, the spacing of the sockets being uniform with the spacing of the plate bosses,. hereinafter described. These sockets open into the channels, so that the plate bosses when inserted in the sockets may be engaged and inter-locked by the cams or locking members on the sliding locking bars 2.

.Within each channel 1 is housed one of these sliding locking bars 2, of any suitable material, said bar being preferably yof the same length as the cylinder. Each bar is provided with an angular head 3 which limits the 'sliding movement of the bar by striking against the ends of the channel. Each bar is also provided with a toothed or rack face 4 with which is adapted to engage the pivoted pawl 5 carried by the top Wall of the channel to normally prevent the backward travel of the rack bar. However, a pin 6 may be attached to the pawl and al lowed to project through a bore 7, near one end of the cylinder, to permit the pawl to be disengaged from the rack to allow the backward shifting of the latter. Each bar is also constructed with a row of wedge-shaped or cam-like locking projections 8 extending therefrom, there being any suitable number of such bosses, and these locking projections are spaced to properly interlock with the spaced bosses 9 on the back or underside of the printing plate B. As stated, these bos/ses are preterably spaced predetermined distances apart, for example, two inches from the center of one boss to the center of any adjacent boss. Each boss is shaped, in any suitable manner, as by grooving, as at 10, or otherwise to enable the boss to interlock with the bar, in the present instance with the adjacent projection 8, of the bar.

In the practice of the invention the plate B is placed on the cylinder so that the bosses on thejback of the plate register with and tit into selected sockets 1, the groove in each boss being exposed to the channel 1 so `that the locking bar in the channel may be shifted to bring one of its cams or locking projections into wedging engagement With,the boss. 0f course, when the plate is thus applied each row of -its bosses will he simultaneously interlocked with the adjacent bar by shlftin the latter, as will be readily understood, terack and paWl preventing the accidental unlocking of the bar by the reverse movement of the, latter. To

. unlock the plate it is only necessary to disengage the pawls from the rack bars and slidel the latter in the lreverse direction to that followed in the locking operation.

In Fi s. 5 to 7 inclusive, I have shown a modi ed form of the invention wherein it is adapted to fastening flat plates. In this form of the invention the printing plate Leaaeaa E is provided with spaced bosses 11, in this ca'sealso having grooves 12 therein adapted to receive the' locking projections or parts 13 of the bars 14. However, in this case these bars 14 slide in channels 15 in a saddle or base F which is adapted to be mounted on the flat printing bed of a printing press, said saddle having spaced sockets 1G which open into the channels 15, as described for the cylinder press. The operation of this form of the invention is similar to that described for the cylinder press.

I have herein shown and described eertain details of construction as to the lockings bars, bosses, and other parts, but I wish it to be understood that this is merely by way of illustration as various modiica` tions and changes can be made in such respects without departing from the spirit of the invention or exceeding the scope of the claims.

What I claim is:

1. rll`he combination With a printing plate support, of a printing plate having means at the back facethereof for registering the plate in various predetermined positionsor locations on the support and means on-the support for engaging with the registering means on the plate to hold said plate in any selected registeredposition on the support.

2. The combination with a plate having a projection at the-back thereof, of a slidijng locking bar adapted to interlock with the projection of the plate to hold the latter in any selected and predetermined position, and means for holding the bar in a locked position.

3i The combination with a printing plate having a series of spaced locking bosses formed on the back face thereof. of a support for said plate having a series of sliding locking bars adapted toengage with 'the bosses of the plate to lock such plate on the support and means for holding each locking bar in locked position.

4. The combination with a printing plate` having a series of spaced locking bosses formed on the back face thereof, each of said bosses having a groove therein, of a support for said plate having a series of sliding locking bars adapted to seat in the grooves of the bo'sses of the late to lock such plate on the support, an a pawl and ratchet device4 for each of said bars for holding the'bar in locked position.

5. ,The combination of a printing plate havin a spaced locking boss on the back face iihereof, said boss having a groove therein, of a supportfor said plate having a slot therein, a locking har sliding in said slot and having a Jortion adapted to seat in the groove of tile boss of the plate to lock such plate on the support. and means for holding the locking bar in locked position.

6. The combination With a printing plate support having a series of rofws of uniformly spaced sockets formed therein, of a printing plate Having a series of rows of projections spaced correspondingly to the rows of sockets and adapted to fit therein, and means extending through said sockets and engaging the projections for fasteningthe plate t0 the snp'port.

7. A printing plate having a series of rows of spaced projections formed on the under face thereof, each of said projections having a socket therein to receive a fastening device whereby said plate may be secured to a support.

8. The combination Iwith a saddle adapted to be attached to a printing press, of a printing plate adapted to be attached to the saddle, and means, including equi-distant uniformly spaced complementary depressions and projections for insuring the selective fitting of the plate on the saddle.

In testimony whereof I aiX my sio'nature.

EMIL n. NovoiNY.

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