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Publication numberUS738423 A
Publication typeGrant
Publication dateSep 8, 1903
Filing dateJun 2, 1900
Priority dateJun 2, 1900
Publication numberUS 738423 A, US 738423A, US-A-738423, US738423 A, US738423A
InventorsEdward G Durant
Original AssigneeEdward G Durant
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Flask for molding building-blocks or the like.
US 738423 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

No. 738,423. PATENTED SEPT. 8. 1903.




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SPECIFICATION forming part of Letters Patent No. 738,423, dated September 8, 1903. Application filed June 2,1900- Serial No. 18,882. (No model.)

To 62% whom it may concern:

Be it known that I, EDWARD G. DURANT, a citizen of the United States, residing at Pasadena, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Flasks for Molding Building-Blocks or the Like, of which the fol lowing is a specification.

My present invention pertains to an improved flask for molding plastic and cementitious materials, the construction and advantages of which will be hereinafter set forth, reference being had to the accompanying drawings, wherein- Figure 1 is a perspective view of the flask as a whole; Fig. 2, a similar view with the cope removed; Fig. 3, a top plan view; Fig. 4, a longitudinal sectional view with the cores in position; Fig. 5, a vertical sectional view of a portion of the flask, showing the means employed for connecting the, various parts together; Fig. 6, aperspective view of one of the core-pieces, and Fig. 7 a perspective view of the block made in such a flask as is illustrated in the foregoing figures.

The objects of my invention are, first, to provide a flask in which building-blocks or the like may be produced having one or more finished faces-as, for example, blocks representing cut or carved stonework; second, to bring about in a satisfactory manner the use of a fine surface material with a coarser and cheaper backing, and, lastly, to so core the blocks as to dispense with the use of any material not needed or essential to the article i produced.

In the flask, to be hereinafter described in detail, the material is to be compacted therein by repeated blows applied to small portions of the material rather than by treatment in mass under heavy pressure. By thus gradually building'up the block the best results are obtained. A highgrade block may be produced by hand at a less cost than it is now produced by the useof expensive machinery and the employment of power.

In the drawings the lower or drag portion of the flask is composed in part of three hinged or attached sections-a front A and two end sections B B. The back 0 is preferably formed of a single piece of metal, having openings D formed therein, which correspond with similar openings E in the front of the flask, the openings E being completed by the upper member F of the cope or upper section of the mold. The end members G G of the cope-section are hinged or attached to the front section F in a manner similar to the corresponding parts of the drag. As is the case with the drag, the cope members are flanged, so as to stiffen and strengthen the same. The back C is held in its position with relation to the cope and drag by latches H, which engage pins I, extending out from the ends of the back section 0. Openings J are formed in the end sections B G and B G for the admission of suitable cores.

The bottom or platen K comprises a single piece of material having any desired design or pattern upon its uppermost face. It is held in position by having its forward end and side edges extend into a groove or channel L, formed in the lower edge of the front section A and in the lower edges of the end sections B B. It is also secured to the back 0 by turn buttons or buckles M. (Shown in Fig. 4.)

The core members are composed or made of light sheet metal or the like, five core-pieces being employed in connection with the flask herein shown. One of said core-pieces is ilustrated in Fig. 6 and is, as will be noted, provided with a transversely-extending cross bar or member N, which forms a handhold to assist in withdrawing the cores from the plastic mass or finished block.

In Fig. 3 the cores are shown in position and numbered 1, 2, 3, 4t, and 5, respectively.

The cores 1 and 2, as will be noted, extend across the flask, having their bearings in the openings D E, While the central core 4 rests intermediate the back and the front of the flask between the cores 1 and 2. The cores 3 and 5 extend in from the openings J and abut against the sides of the transverse cores 1 and 2. If desired, the back 0 may be made in two parts, though ordinarily and by preference it will be made in a single piece and utilized, as hereinafter explained, as a carry: ing-board. In using the flask to produce a block, such as shown in Fig. 7, wherein the block is provided with end openings and openings upon two opposite faces, with a stiffening rib or flange extending transversely across said'material reaches a level with the bottom the block intermediate the openings, the following operation is carried out:

The platen or bottom K, having the design desired to be reproduced upon one face of the block, is secured in place in connection with the hinge members of the drag and the back O. Said platen or bottom is then treated with a layer of the material to be used for the face of the block, and the same is tamped or compressed to the desired degree. Backing material of a cheaper grade is then put in the mold or flask and likewise tamped. When of the openings D, E, and J, it is struck 011 by a straight-edge working on the flanges defining said openings. The core member 4 is then put in position, the cores 1 and 2 set in place, and the core members 3 and 5 likewise put in position. The operator then continues to fill in around the cores with the material until the height of the drag is reached, when the cope is put in place and the operation of filling in is continued. To maintain the cope in its proper position relative to the drag and the core-pieces, pins 0 are employed, which extend down through the flanges of the various members. Should it be desired, the cope may be put in position immediately after the core-pieces are placed.

A top platen P, Fig. 1, may be employed if found desirable, in which instance the under face of said platen may be provided with a figured surface which will give an ornamental finish to the upper portion of the block. If such ornamentation, however, is not desired, the block may be smoothed off by simply running a straight-edge alongthe upper surface or edge of the cope. After the block has been thus formed, the flask is turned over, so as to rest upon the back 0. The core members 1 and 2 are then withdrawn, as are also the cores 3 and 5. The latches H are disengaged from the pins I and the latches M also loosened, so that the hinge members of the cope and drag may be withdrawn from the block, as may also the platen or bottom K. After these parts are removed the operator withdraws the central core-section 4. The completed block with the ornamented face or faces, as the case may be, is then left resting upon the back 0, which may be used to bear it away to any point where it may be suitably dried and cured. From this it will be seen that all of the members of the flask with the exception of the back 0 are again ready to be employed in the formation of a new block, so that it is only necessary to have duplicate backs or members 0.

While the cores have been shown as made up of asinglepiece, it is evident that they may be divided, if so desired. It is also manifest that when corner or angle blocks are to be formed a finishing-platen may be inserted in one end of the flask to produce a face or finish that shall correspond with the long finished face of the block or other end pieces without core-openings may be employed as ends of the flask. It is likewise manifest that various means may be employed for attaching the back and the side members to one another, and I do not desire to be understood as limiting myself to the use of the latches and pins, as shown. So, too, the bottom or platen may be supported in any approved manner with relation to the other parts. Under some conditions cores 3, 4, and 5 may be omitted, in which case the openings in the ends will be suitably closed or end sections without the openings employed...

Having thus described my invention, what I claim is 1. In a flask for forming building-blocks and the like, the combination of a back of a size equal to the side of the block to be formed and serving as a carrying-off section for the block; a series of detachable sides working in conjunction with said back, each side being formed of a series of sections; and a bottom or platen working in conjunction with said back and the side members.

2. In a flask for forming building-blocks and the like, the combination of a back having openings formed therein for the reception of core-pieces, said back being of a size equal to the side of the block and serving when the block is completed as a carrying-off section therefor; a series of side members detachably connected to the back, each side being formed of a series of sections, the adjacent edges of which are formed with recesses, which when the parts are assembled form core-openings; a platen or bottom connected to said back and the sides; and core-pieces extending through the openings in the back and sides.

3. In a flask for molding building-blocks and the like, the combination of aback serving as a carrying-off section and having openings formed therein; a drag comprising hinged members A, B, B; acope comprising members F,G,G,the members A and F having openings E, E, formed therein and the members B, G, and B, G, having openings Jformed therein; means for connectingthe drag, the back and the cope together; and a platen working in conjunction with the drag and the back.

4. In a flask for molding building-blocks and the like, the combination of a back having openings formed. therein; a front section having openings formed therein; end sections hinged to said front section, each likewise provided with an opening; means for securing said ends and the back together; a platen secured intermediate the front, the sides, and the back; core members 1 and 2 extending through the openings in the front and back; a core member supported intermediate said'cores 1 and 2 and cores extending through the openings in the ends toward the sides of the cores 1 and 2.

5. In a flask for forming building-blocks and the like, the combination of a back provided with openings; a drag consisting of a front section A and members B, B, hinged thereto; a platen K having its front and ends resting in grooves or channels formed in the members A, B, B; latches for securing said platen to the back; a cope comprising a front F and ends G, G hinged thereto; means for securing the cope and drag to the back; means for securing the cope and drag in alinement; and cores extending through the flask, substantially as described.

6. In a flask for forming building-blocks I and the like, the combination of a back, said back serving as a carrying-0E member; a

drag member detachably secured thereto; a platen working in conjunction with said drag andsthe back; a cope secured to the back and 15 to the drag; and a top or platen P for the upper portion of the flask.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2630614 *May 4, 1951Mar 10, 1953Peterson Louis LCasting form
US3030687 *Jun 23, 1958Apr 24, 1962Paul M MusprattMethod and apparatus for producing a monolithic concrete construction panel
US3313515 *Dec 17, 1962Apr 11, 1967Jr Clarence T MullenSkimmer cavity casting apparatus with means for holding plumbing conduit
US3352529 *Oct 22, 1965Nov 14, 1967Haas Wilson EMold apparatus for hollow building elements
US3632078 *Apr 10, 1969Jan 4, 1972West Coast Ind IncConcrete form
US4788096 *Feb 24, 1987Nov 29, 1988Hoechst Celanese CorporationDevices for making piezoelectric ceramic or ceramic-base composite sensors
US5108282 *Mar 20, 1990Apr 28, 1992National Concrete Masonry AssociationBiaxial concrete masonry casting apparatus
Cooperative ClassificationB28B7/168