US1103665A - Printing-press. - Google Patents

Description

G. P. PENNER.

PRINTING PRESS.

APPLICATION FILED .AUG.16, 191a.

Patented July 14, 1914.

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G. P. FENNER.

PRINTING PRESS.

APPLICATION 211.21) we. 1a, 1913.

1,103,665. I Patented July 14, 1914.

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PRINTING PRESS.

APPLICATION FILED AUG. 16, 1913.

Patented July 14, 1914.

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PRINTING PRESS.

APPLICATION FILED AUG. 16, 1913.

Patented July 14, 1914.

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GEORGE P. FENNER, OF NEW LONDON, CONNECTICUT.

PRINTING-PRESS.

To all whom it may concern Be it known that I, GEORGE P. Finance, a citizen of the United States, residing at New London, county of New London, State of Connecticut, have invented new and useful Improvements in Printing-Presses, of which the following is a specification.

This invention relates to a printing press which is adapted to print a sheet at each revolution of the impression cylinder, and the invention refers particularly to the devices for tripping the impression cylinder.

The printing press combines a bed having rectilinear reciprocating motion and a cylinder made to revolve once for each impression. The cylinder in this press is timed to rise and fall at every revolution while it is printing, the cylinder being elevated when it takes the sheet, and lowered when it makes the impression. In a fiat bed printing press the cylinder must either be raised to allow the bed to make its return stroke after the impression, or the cylinder must be turned with two diameters, one being considerably smaller than the impression, thus allowing the bed to make its return stroke without coming into contact with the cylinder.

The press shown in the present invention has no depression or low side, that is to say; the portion of the cylinder which does not print is of the same diameter as its impression surface. A cylinder of this kind must be raised after every impression and it will be apparent that the impression must be taken and the cylinder elevated to its vertical position for taking the sheet from the feed board during approximately one half of the revolution of the cylinder.

With a flat bed press one half of each revolution must be employed for the bed to make its return stroke. This limits the impression surface of the cylinder to only a portion of the traverse of the bed, on its forward or the printing stroke. In the press herewith illustrated the amount of surface which can be used for the impression is about one quarter of the surface of the cylinder. This is about the normal surface used for the impression in this kind of press that is, flat bed, one revolution machine. Heretofore in rotary printing presses with elevating and lowering means, the impression cylinder remains normally at rest,

that is in contact with the type cylinder Specification of Letters Patent.

Application filed August 16, 1913.

Patented July 14:, 1914:.

Serial No. 785,071.

when printing, except when the impression is tripped then the cylinder rises and falls but does not print or make the impression. This function of the cylinder remaining normally at rest when printing is shown and described in my U. S. patent application Serial No. 7 50,7 33 filed February 26th, 1913.

The present invention is more fully described in the following specification and claims and illustrated in the accompanying drawings in which:

Figure 1 represents a side elevation of a press showing the cylinder after it has made the impression. Fig. 2 is a front view of the same, some of the parts having been removed. Fig. 3 is a side elevation on a larger scale showing the cylinder in a position to take the sheet. Fig. 4 is a similar view showing the cylinder elevated and tripped.

In the drawings is shown a press having a frame a on which is mounted an impression cylinder 6 and a type bed 0. The impression cylinder can be rotated and the bed given reciprocating movement in a rectilinear horizontal path in any well known way, the mechanism for driving the bed and the cylinder is well known and there fore is not shown in the drawing. The cylinder has an impression surface (Z covering about one quarter of the periphery of the cylinder, and the cylinder carries the usual grippers Y The impression cylinder is provided with a shaft which is journaled in slides g 10- eated at each side of the press and of suitable construction to move vertically in the side frames. A coiled spring h co-acts with the lower portion of each slide, and these springs tend to push the cylinder upward. At the upper portion of each slide is connected a toggle lever 2' each toggle having an arm j fixed to the upper portion of a toggle. A rocker shaft 70 extends across the press between the frames and it has fulcrumed to it levers m and m connected to the arms 7' of the toggle levers. The arm m on one side of the press is provided with an upwardly extending arm n constituting a bell crank lever and having a stud 0 fixed to its upper end, the function of which will be hereinafter described.

One side of the press is provided with a cam 79 best seen in Fig. 2, which is secured to the cylinder or the shaft. A lever g is pivoted at r to the inner side of the frame, and this lever has mounted on it an antifriction roller 8 for engagement withthe groove of the cam. To theupper end of the lever Q is pivoted a reciprocating hook member 6 having an angular slot at which coacts with the stud 0 on the upwardly extending arm n mentioned above. A rod 0; is pivoted to one end of the hook member 7? while the lower end of the rod is pivoted to a lever to. A treadle m is connected to one end of the lever to. The stem y of this treadle is provided with a projection or-lug 2 for engagement with a bar 5 fixed to the frame. A spring 6 is adapted to normally hold the stem out of engagement with the bar, and at the same time the spring positions the reciprocating member and holds the stud 0 ofthe lever in the angular portion of the slot. Consequently the lever will be actuated by the movement of the reciprocating slotted member and impart by means of its connections movement to the toggle lever to elevate and lower the cylinder.

A latch 7 is swingingly pivoted to the frame and it is normally held against a stop 8 by a spring 9 secured to the latch and the frame. The latch prevents tripping of the cylinder at the wrong time, except for this latch the operator might depress the treadle when the cylinder is down. The cam would then startthe toggles to lift the cylinder, as soon as the cylinder were part way up, the force of the spring it would be likely to throw the cylinder up faster than the cam would carry it, and the result would be a shock to the lifting parts and possibly break-.

age. Immediately after taking the impression and before taking another sheet, the printed sheet is conducted off on to a delivery reel 1O through reel grippers 11 thus leaving the cylinder grippers c at liberty to grasp the next sheet fromthe feed board. The cylinder is shown in position to trip in Fig. 3, the latch being out of register.

7 with the projection on the reciprocating member. In this position the reciprocating slotted member can be swung upwardly through the medium of the treadle, and the stud 0 of the lever disengaged from the angular portion of the slot. The cam by means of its connections then moves the reciprocating member to and fro and the elevating and lowering devices will remain stationary as indicated in Fig. 4, and the cylinder is maintained in its vertical position out of contact with the bed The latch in this instance swings with the reciprocating member as indicated in the latter figure.

The action of the impression cylinder is as follows: The grippers grasp the sheet when the cylinder is in its vertical position, the cylinder revolves ahead carrying the clean sheet until the cylinder has made about one quarter of a revolution. The cam on the end of the cylinder then begins to lower the cylinder bringing the cylinder into its printing position, that is down, just before the leading edgeofth'e impression comes into Contact with the type, that is not more than an inchor two before the grippers reach a point exactly under the axis of the cylinder grippers open and the reel grippers close,

thus'transferring the sheet from the impressjion cylinder on to the delivery reel. The

cylinder continues its vertical action, and it is cleanup ready to grasp the next sheet before the grippers reach the point of closing. The'cylinder is heldinthis upward, sheet taking position until after the grippers are closed and it has made about one quarter of a revolution as before mentioned.

l Although it is possible to make a press of this character with the diameter of thecyliiider at all points alike, I do not want to be confined to a cylinder of that class, as making the cylinder with two diameters, to perform the same function is not excessively expensive.

It should be noted that after the cylinder I grippers are closed, to take the sheet, the cylinder revolves about one fourth of a revolution; this gives the operator ample time to trip thecylinder, if he misses feeding a sheet.

, I claim:

1. In a single revolution printing press the combination with an impression cylinder and a bed, means operated by the impres sion cylinder for elevating and lowering the cylinder, means including a reciprocating member normally in action with the cylinder elevating and lowering means for controlling the cylinder to rise and fallat each impression, and means for preventing accidental throw of the elevating and lowering devices when the cylinder is lowered.

2. In a single revolution printing press the combination with an impression cylinder and a bed, means operated by the impression cylinder for elevating and lowering the cylinder, means including a reciprocating member normally in action'with the cylinder elevating and lowering means for controlling the cylinder to take the impression when lowered at each revolution, and means for preventing accidental throw of the elevating and lowering devices whenthe cylinder is lowered.

3. In a single revolution printing press the combination with an impression cylinder and a bed, means operated by the 1mpression cylinder for elevating and lowering the cylinder, and means including a reciprocating member normally actuated by the cylinder elevating and lowering means for controlling the cylinder to take the impression when lowered and to grip the sheet when elevated at each revolution, and means for preventing accidental throw of the elevating and lowering devices when the cylinder is lowered.

l. In a single revolution printing press the combination with an impression cylinder and a bed, means operated by the impression cylinder for elevating and lowering the cylinder, and means including a reciprocating member normally actuated by the cylinder elevating and lowering means for controlling the cylinder to take the impression when lowered and to grip the sheet when elevated in approximately one half of a revolution of the cylinder, and means for preventing accidental throw of the elevating and lowering devices when the cylinder is lowered.

5. In a single revolution printing press the combination with an impression cylinder and a bed, a cam carried by the impression cylinder, means connected to the cam for elevating and lowering the cylinder, means including a reciprocating hook member normally in action with the cylinder elevating and lowering means for controlling the cylinder to elevate it during one half its revolution and to lower the cylinder during the other half to take the impression, and means for preventing accidental throw of the elevating and lowering devices when the cylinder is lowered.

6. In a single revolution printing press the combination with a bed, of an impression cylinder in which the impression surface is less than one half the periphery, a cam carried by the impression cylinder, means connected to the cam for elevating and lowering the cylinder, means including a reciprocating member normally in action with the cylinder elevating and lowering means for governing the movement of one half of the cylinder during approximately the other one half of the revolution not employed by taking the impression.

7. In a single revolution printing press the combination with an impression cylinder and a bed, of a cam carried by the impression cylinder, a lever actuated by the cam, a reciprocating member connected to the lever, means controlled by the reciprocating member for elevating and lowering the cylinder, tripping devices for positioning the reciprocating. member tothrow the elevating and lowering means in or out of action, a latch to engage the reciprocating member at predetermined times to prevent accidental throw of the elevating and lowering means when the cylinder is lowered.

In testimony whereoi I have hereunto set my hand in the presence of two subscribing witnesses.

GEQRGE P. FENNER. VVitne sses EVA L. I-IUDsoN, ANNA O. RAsMussEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents, Washington, D. G.

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