US2047280A - Paper roll stand for printing presses - Google Patents

Description

July 14, 1936. MELNICK 2,047,280

PAPER ROLL STAND FOR PRINTING PRESSES Filed Feb. 1, 1935 3 Sheets-Sheet l INVENTOR- War/ 7 M A ORNEYS July 14, 1936. M. MELNICK 2,047,280

' PAPER ROLL STAND FOR PRINTING PRESSES Filed Feb. 1, 1953 5 Sheets-Sheet 2 INVENTO R- JVeZzzzc/c M ATTORNEYS July 14, 1936. M. MELNICK 2,047,280

PAPER ROLL STAND FOR PRINTING PRESSES Filed Feb. 1, 1933 t 5 Sheets-Sheet 3 INVENTOR- Myer Mehzzk' BY n M4 ATTORNEYS Patented July 14, 1936 UNITED STATES PATENT OFFICE Myer Melnick, Bronx,

SES

N. Y., assignor to Irving Trust Company, a corporation of New York, trustee for R. Hoe & (30., Inc., a corporation of New York, debtor Application February 1, 1933, Serial No. 654,564

4 Claims.

The present invention relates broadly to an attachment for paper rolls, and more specifically as an attachment for use with paper roll stands for printing presses.

In a modern newspaper plant, an edition of millions of copies of the paper must be printed in a relatively very short space of time. Any operation which slows down or interrupts the printing operations during this period is a serious matter. In the modern high speed presses, afull roll of paper is exhausted in about eleven minutes and a new roll must then be brought into service. It is a serious matter if the exhausted roll should run out and the press should lose the sheet. If the press turns over without the sheet in place, the platen rolls become covered with ink which will smudge the succeeding sheets; and furthermore, takes several minutes to re-thread the sheet through the press. In view of these facts, an operator watches the paper roll stand and slows down or stops the press before a roll is completely exhausted. It is difiicult to judge the margin of safety on the nearly exhausted roll, and, therefore, the operator usually stops the press well before there is any danger of the sheet being completely unwound from the roll core. This results in a substantial waste of paper because the core contains several layers when the exhausted roll is discarded.

The present invention overcomes the difficulties of the known art by providing means which are automatically operative to inform the operator when the limit of safety is reached so that a new roll may be brought into use without disturbing the printing operations. To this end, the device may comprise a detecting mechanism which operates a signal to inform the operator that the safety limit of the roll in use is reached; or in the preferred form, the device automatically slows down the press to such a speed that the end of the new roll may be attached to the end of the prior sheet. Printing presses are equipped with a number of control buttons, one of which slows down the operation of the press to enable the leading end of a new roll to be pasted to the end of the prior sheet and this button is known as the paster button which when operated controls the electric motors driving the press to slow them down to the proper speed for the pasting operation. The present invention may cooperate automatically with the circuit controlled by the paster button so that as soon as the press slows down, the operator may perform the pasting operation specified.

The present invention may be embodied in various forms of devices, but in its simplest form comprises a plurality of feeler or control arms pivoted on the roll stand shaft in such manner that each arm cooperates with a paper roll, and with the particular arm which cooperates with 5 the roll in use feeding the press to automatically operate the paster button circuit when this roll is exhausted to a safe limit.

This result may be brought about by providing a spring pressed control arm carrying a feeler 10 shoe, or roller, bearing against the surface of the paper roll, so that when the arm is moved angularly under the action of the spring, as the roll is depleted, a contact is made by the arm when the margin of safety is reached, thereby causing the 15 press controls to slow down the press as described. Actual experiments have shown that the control arm should be of relatively light mass and should be spring pressed into engagement with the paper roll. A heavy arm bearing directly on the roll or 20 an arm which is weight pressed against the roll does not operate satisfactorily because paper rolls usually are 'not accurately wound, and therefore, the roll surface is not concentric with the axes of the core. This eccentricity of the roll throws a 25 weighted arm away from the surface when the roll is rotating at high speed toward the end of the sheet and this action may be sufficient to prevent a weighted arm from touching more than the high spot of an eccentric roll. This action may 0 delay the operation of the device beyond the limit of safety.

It is recognized that the present invention may be embodied in constructions other than those specifically disclosed herewith, and, therefore, the present disclosure is to be understood as illustrative and not in the limiting sense.

Fig. 1 is a more or less diagrammatic view illustrating one form of the invention.

Fig. 2 is an enlarged detail view of the type of contact shown in Fig. 1. I

Fig. 3 illustrates a modification of the invention wherein the control arm is in two sections, one of which is weighted and the other comprising a light weight member carrying a feeler roller and adapted for independent movement relative to the heavy portion of the arm.

Fig. 4 is an enlarged view illustrating the hinge and a type of spring adapted to force the control arm toward the surface of the paper roll.

Fig. 5 is an enlarged detail view of the feeler roller end of the arm shown in Fig. 3.

Fig. 6 is a modification of the feeler roller construction.

Referring to Fig. 1, the paper rolls A, B, and

C, are mounted upon a roll stand provided with three arms I carried by a central shaft, the axis of which is indicated at 2 and which are supported upon standards, all of which is well known in the art. The paper is brought to the roll stand by a small truck 4 which runs upon the tracks 5 so that the core 6 of the paper roll may be mounted in one of the arms I. As the truck 4 is brought into position in the direction of the arrow X, the surface of the roll of paper A engages a feeler roller 1 on a control arm 8 and as the roll is moved into place, it swings the arm on its pivot I 5 carried by ears 9 on a plate i3 mounted on the frame ring N. This frame ring may comprise separate segments bolted to the center shaft or take the form of jointed members clamped around the center shaft by a clamp screw l2. This movement of the control arm 8 when the roll A is brought into position places added tension on the coil spring M which is mounted on the pivot shaft l5 for the control arm 8 (Fig. 4). When the core 6 of the roll A is secured to the arms I of the roll stand, the truck 4 is removed so that this roll is supported to rotate on the core 6. There is a control arm 8 for each of the three paper rolls. The pivot shaft l5 for the control arm carries a cam member l6 which bears against a contact spring H.

As the control arm 8 moves inwardly toward the plate It) as the used roll is exhausted, the cam IE depresses contact spring I! until the contact l8 thereon engages the contact I!) on the plate 9. These contacts are preferably connected with commutator segments 28, each control arm having its own pair of commutator segments. The pair of commutator segments which corresponds to the control arm 8 which cooperates with the paper roll C that is in use to feed the sheet 2| to the press, is brought into engagement with a pair of brushes 22 that are connected in the line 24 in parallel with the paster button 25, when the center shaft of the roll stand is rotated to bring a roll into operating engagement.

From the foregoing, it will be observed that as the roll C is exhausted, the contact arm 8 cooperating therewith will gradually move toward the axis of the core 6 of this roll C. When the feeler roll 1 has moved inwardly to the limit of safety, the cam l6 closes the contacts l8 and Hi. This operation controls the paster button circuit exactly the same as if the paster button 25 were operated. Therefore, the press is automatically slowed down. The central shaft of the roll stand is rotated by mechanism commonly provided in the art for this purpose and the roll B is brought into contact with the sheet 2! and the leading end of the paper strip on the roll B is pasted to the sheet 6 which is then broken by the operator and then the roll B is brought to the position previously occupied by the roll C so that a full roll is now in position to feed the paper sheet to the press.

Referring more especially to Figs. 3, 4, and 5, which illustrate a slight modification of the present invention, it will be observed that the control arm 8 is divided into two parts. The part which is pivoted to the plate It] is a relatively heavy arm 26 which may carry an inertia weight 21. The feeler roller 7 is mounted upon a very light weight extension 28, which is pivoted for oscillatory movement in the outer end of the weighted arm 26. This extension arm 28 carries a crank 29 which is connected with a relatively light spring 33 through a springadjuster 3|. The spring I4 and the spring 30 are of such relative stress as to obviate harmonic or vibratory relation between the springs and also to obviate an undue angular movement of the extension arm 28 relative to the weighted arm 26. In this construction, the light extension arm 28 may oscil- 5 late when an eccentric or uneven wound roll is feeding the press. The weighted arm 26 carrying the weight 21 because the inertia of its mass tends to remain stationary while the spring 30 holds the feeler roller 2'! in contact with the eccentric or uneven surface of the rapidly rotating paper roll. The inward movement of the weighted arm 26 under the influence of the coil spring I4 follows the lessening diameter of the roll which is feeding the press and thereby operates the electric contact at the proper time. The contact disclosed in this form of the invention comprises a snap contact member 32 having a pair of arms 34 and 35 which engage an operating pin 36 mounted on the control arm 8. The snap member is provided with a projection 31 against which a snap spring 38 bears. As the control arm moves toward the plate ID, the pin 36 bearing against the arm 35 rotates the snap member around the bolt 39 until the projection 3! passes beyond the line of pressure between the snap spring 38 and the axis of the bolt 39, at which time the action of the snap spring 38 on the snap member 32 quickly snaps the contact 4 on the arm 35 into engagement with the stationary 30 truck 4, the pin 36 engages the arm 34 of the 35 snap member to open the contact and reset the snap switch to open position, as the control arm is flexed on its point.

Referring now to Fig. 6 which illustrates a modification of the feeler roller, the paper roll is illustrated as being nearly exhausted so that a very thin layer of paper remains on the core 6. The outer end of the control arm 8, which may be of the form illustrated in Fig. 1, or in Figs. 3 to 5, carries at its outer end a light weight feeler portion comprising a V-shaped roller bracket 42 which is pivoted at 44 to the control arm 8. This V-shaped bracket carries a pair of feeler rollers 45 and 46, both of which bear against the paper on the paper roll under the pressure of 5 the spring l4 for the control arm. Leaf springs 41 and 48 are mounted upon the control arm and bear on opposite sides of the V-shaped bracket 42. These springs 41 and 48 permit the V-shaped bracket 42 to oscillate around its pivot 44. This 5 oscillating movement accommodates irregularities in the paper roll and minimizes the effect of such irregularities on the movement of the control arm 8. The V-shaped bracket 42 and the feeler rollers 45 and 46 are preferably of light weight material in order to obviate inertia due to the mass of these parts.

It is to be understood that suitable covers are provided for the contacts and commutators to avoid any dust or dirt from interfering with the proper operation of these parts and to protect operators from danger of electrical shocks. Since covers are a common well known feature of the art, they have been omitted from the drawings for the sake of clearness.

The device comprising the present invention is both efficient and practical and does not interfere with the normal operations of handling the paper to feed a printing press and its use results in great saving of paper to large newspaper plants. It is to be understood that the present invention is not intended to be limited specifically to its operation in connection wih newspaper presses since it has a general utility in connection with roll sheet feed control.

What I claim is:

1. A device of the class described comprising a paper roll support adapted to carry a paper roll, a control arm pivoted at one end and free at the other end and with the free end of the arm bearing against the surface of the paper on said paper roll, a Weight separate from the arm but carried by the portion of the arm between the pivot and the free end of said arm to provide an inertia portion of said arm and the free end of said arm being of light weight in order to obviate inertia of the arm from causing the free end thereof to be thrown from the paper when the roll operates at a relatively high speed, spring means urging said free end of said arm against said paper roll, and contact means operated by said arm when the free end of said arm has been moved to a predetermined limit.

2. A device of the class described comprising in combination, means to support a roll of paper, a control member comprising a pivoted arm and a control arm adapted to engage the surface of the roll of paper, said pivoted arm being weighted in order to provide inertia against said sudden movements of said control member,

feeler portion movable relative to said weighted 10 portion and pivoted on said weighted portion, a pivot for said weighted portion, spring means to urge the light weight feeler portion against a paper roll, and electrical contact means adapted to be rendered operative when said weighted 15 portion has been moved to a predetermined limit.

4. A device of the class described comprising a paper roll support, a control member comprising a heavy weighted portion and a light weight feeler portion movable relative to said Weighted 20 portion, and pivoted on said weighted portion, a pivot for said weighted portion, spring means to urge the light weight feeler portion against a paper roll, spring means to control the relative movement between the light feeler portion 5 and the weighted portion of said control member, and electrical contact means adapted to be rendered operative when said weighted portion has been moved to a predetermined limit.

MYER MELNICK. 30

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