US727436A - Platen-press. - Google Patents

Description

No. 727,436. PATENTED MAY 5, 1903.

' 0. PILZ.

- PLATEN PRESS.

APPLICATION rILnn APR. 2, 1002. no 1101931.. ,2 sums-sum- 1. J

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PATENTED' MAY 5, 1903.

0. PILZ.

PLATEN PRESS. APPLIIOATION FILED APR. 2, 1902.

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Patented May 5, 1903.

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OTTO PILZ, OF FRANKENTHAL, GERMANY.

PLATEN -PRESS.

SPECIFICATION forming part of Letters Patent No. 727,436, dated May 5, 1903.

Application filed April 2,1902. Serial No. 101,117. (No model.)

To all whom it may concern.-

Be it known that I, OTTO PILZ, a subject of the Emperor of Germany, and a resident of Frankenthal, Rheinbayern, Germany, have invented certain new and useful Improvements in Platen-Presses, of which the following is a full, clear, and exact description.

The present invention consists of a simple and effective device for protecting the hands and fingers of the operator when placing the sheets of paper in the platen-press, as hereinafter described, and particularly pointed out in the claims.

In order to render the present specification easily intelligible, reference is had to-the accompanying drawings, in which similar letters of reference denote similarparts throughout the several views.

Figure l is a front elevation of the press; Fig. 2, a part-sectional plan of the guard; Fig. 3, a side elevation of the press, showing the platen in the position for printing; and Fig. 4, a similar elevation with the platen thrown back and the guard lowered. Figs. 5 and 6 show a modified form of the invention, the former figure showing in side elevation the guard raised in its operative position and the latter showing a similar elevation with the platen thrown back and the guard lowered.

Referring first to Figs. 1 to 4:, the guard consists of a bow or frame D, having its shanks somewhat bent, so as to conform to the shape of the upper part of the platen A and to lie fiat down on the same, Fig. 4.,when not in its operative position. hen the platen A is moved up to the bed to perform the printing operation, the guard D comes into operation, Fig. 3, to push the hands and fingers of the operator upward and backward and prevent them from becoming jammed between the platen and bed or otherwise injured. This movement of the guard D is effected by the following means: The shanks of the guard D are rigidly attached to a cross-barE, having at each end legs or shanks E, which are pivot ally supported in the free ends of arms F, rigidly attached to the sides of the platen A. The latter is operated in the well-known manner by the connecting-rods C. At one end (or both ends) of the cross-bar'E an arm E is provided, carrying a roll G, and to one (or both) of the connecting-rods O a cam-surface H is attached, upon which the said roll G runs.

The device operates in the following manner: In printing, the platen A, as is well known, is moved by the connecting-rods C from the position shown in Fig. t toward the bed B to the position shown in Fig. 3. During this movement owing to the abovedescribed attachment of the guard D and its operating-lever E with roll G the said guard will be gradually raised on its pivots and finally when the platen is about to print be thrown up into the position shown in Fig. 3, so that it will act to push up and throw back the hands and lower part of the arms of the operator, who has just laid in the sheet to be printed and prevent them from injury.

As will be clearly seen from Fig. 4, the guard is turned down out of the way of the operator at the commencement of the movement of the platen, when the sheet is laid in and in no Way impedes his work. If desired, the guard may be thrown out of operation entirely by turning the bar E back to the rear of its pivots on the arms F.

In the modification shown at Figs. 5 and 6 the roll G and the cam H are omitted, and to the pivot of the said roll Gr the upper end of a rod Jis suspended, the said rod being guided in its longitudinal direction by means of an eye or sleeve K, fixed in the side of the platen. As the latter is moved up to the bed the lower end of the rod J comes into contact with a stop or lug L, fast to a stationary part of the machine-frame, and raises the guard, as will be readily understood from Figs. 5 and 6 of the drawings.

I claim as my invention- 1. In a platen-press, the combination of a hand guard-plate bent to conform to the shape of the upper part of the platen and to lie flat onto the same in its inoperative position, a cross-bar having shanks at its ends to which said guard is rigidly attached arms fixed to the platen to pivotally support the rear end shanks at its ends and to which said guard is rigidly attached, arms fixed to the platen to which the shank of said cross-bar are pivoted and means in connection with the crossbar and platen connecting-rods to throw up the guard when the platen is moved to the bed substantially as described.

3. In a platen-press, the combination of a handguard-plate bent to conform to the shape of the upper part of the platen and to lie flat onto the same in its inoperative position, a cross-bar having shanks at its ends to which said guard is rigidly. attached arms fixed to the platen to pivotally support the rear end of said shanks rolls'at the forward ends of 15 said shanks and cams fast to the connectingrods of the platen to operate the said rolls to throw up the guard,when the platen is moved toward the bed substantially as described.

In witness whereof I have hereunto set my 20 hand in presence of two witnesses.

OTTO PILZ.

Witnesses:

WOLDEMAR HAUPT, HENRY I-IASPER.

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