US274728A - Apparatus for casting printers rollers - Google Patents

Apparatus for casting printers rollers Download PDF


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US274728A US274728DA US274728A US 274728 A US274728 A US 274728A US 274728D A US274728D A US 274728DA US 274728 A US274728 A US 274728A
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printers rollers
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    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/27Sprue channels Runner channels or runner nozzles
    • B29C45/28Closure devices therefor
    • B29C45/2806Closure devices therefor consisting of needle valve systems


(NO Model.)



Patented M ar.27,1883.

HI I IW W 1 ll 1.

following is a full, clear, and exact description,


CHARLES W. cnucrs nenn, on sir. LOUIS, MISSOURI.


SPECIFICATION forming part of Letters Patent No. 274,728, dated March 27, 1883.

Application filed July 19, 1881. (No model.)

To all whom it may concern Be it'known that I, CHARLES W. ORUT- SINGER, of the city of St. Louis, in the State of Missouri, have invented a certain newand useful Improvement in Apparatus for the Manufacture of Printers Rollers, of which the reference being had to the accompanying drawings, forming part of this specification.

Heretofore it has been the practice in casting printers rollers to pour the composition M into the top of the mold, and a great disaddle and move about.

vantage arising from this method is, that the air in the mold becomes mixed with the com position, and is apt to leave bubbles on the face of the roller. 7 To overcome this as much as possible, it has been the practice to heat the mold to a high temperature, which, as a matter of course, will aid the escape of the air to a certain extent; but even then rolls are often imperfect, and the time and expense, of casting lost; and, moreover, the excessive heating of the mold makes it inconvenient to han- By the use of my improved apparatusthese difi'iculties are avoided. In the first place, because when the composition is forced intoone end of the mold the other end of the mold, which is on a higher In the accompanying drawings, Figure l is a vertical section of a mold and roller therein, and vessel containing the composition, showin g the connection between them, and also the end of a pipe, through which steam or com' pressed air is admitted to the top of the vessel to force the composition into the mold. Fig. 2 is a horizontal section on line a: as, Fig. 1. Fig. 3 is a detail enlarged section of the bottom of a mold and its supporting-stand with the plug-valve (which prevents the composition from running out when the mold is filled and removed from the vessel) closed. Fig. 4

is a similar view with the said valve in its open position. Fig. 5 is a top view of the star for supporting the upper end of the core concentricallywithin the mold.

A is the mold, supported on a stand, B, which has a central bore, 11, for receiving one of the gudgeons, a, of the core A of the roller. The other gudgeon, a, of the core has bearing in orifice c in the usual star, 0. the two bearings keeping the core concentric within the mold. A p

O is the vessel containing the composition for forming the roller. This vessel may be of any desired size and shape.

D is a steam or other pressure pipe connect- The vessel has at its bottom a short conmeeting-pipe, E, preferably split, as shown, for ease in cleaning, to form a communication between the vesseland the mold through means of the'jchannel f in the stand; or the pipe E may connect directly with the mold above the stand. The connectingpipe E is provided with a cock, 0, to close it when the mold is full, and disconnected therefrom. When the mold is filled, the channel f is also closed by a plugvalve, f, to prevent the composition from running out. The vertical portion of the channel f is made tapering, larger attop than bottom, so that when the roller has been removed from the mold, or the roller and mold from the stand, the channel may be easily cleaned of the hardened composition therein by introducing a wire or pin through the hori' zontal part of the channel.

The neck b of the stand is made larger at to have a number of the connecting-pipes E,

(see Fig. 2,) so that a number of molds may be filled at once. The operation is as follows: The core and mold are fixed upon the stand, as described. The whole is then moved up and connected with the pipe E. The valves e and f are opened, and pressure is admitted to the top of the vessel 0, as described, (either steam or atmospheric pressure may be used,) which forces the composition into the mold. When the mold 'is full the valve 6 is closed, the pressure shut oft, the valvef closed, and the mold removed and replaced by an empty one. The course of the composition is shown by arrows, Fig. 4:.

As a modification of the mechanical device shown to force the composition into the moldnamely, the steam or other pressure pipe-a vacuum may be formed in the mold by an airpump connecting with the top thereot'.

Having thus described my invention, the following is what I claim as new therein and desire to'secure by Letters Patent:

1. The combination of stand B, having orifice b, vertical mold A, open at top, having suitable inlet at bottom, and fitting on the said position under pressure, and a pipe, E, con-' meeting said vessel with the mold at bottom, and provided with a cock, 0, to cut off the supply, as set forth.

2. The combination of stand B, formed with neck b,-orifice b, and channel f, and provided with plug f, the mold A,'having open top, star a core A, having gudgeons a a, vessel for containing composition under pressure, and pipe E, connecting the vessel with the channel f in the stand, as set forth.


In presence of- AUGUST WEBER, GEO. H. KNIGHT.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993233A (en) * 1956-03-27 1961-07-25 Bayer Ag Apparatus and process for making composite structures
US3254599A (en) * 1962-02-19 1966-06-07 Parmarco Inc Flexographic printing
US3263275A (en) * 1963-07-22 1966-08-02 Thiokol Chemical Corp Apparatus for casting small solid propellant rocket motors for testing purposes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2993233A (en) * 1956-03-27 1961-07-25 Bayer Ag Apparatus and process for making composite structures
US3254599A (en) * 1962-02-19 1966-06-07 Parmarco Inc Flexographic printing
US3263275A (en) * 1963-07-22 1966-08-02 Thiokol Chemical Corp Apparatus for casting small solid propellant rocket motors for testing purposes

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