US2004164A - Means for producing containers - Google Patents

Description

June 11, 1935. Q HOFMANN 2,004,164

ATTORNEY June 11, 1935. Q N 2,004,164

MEANS FOR PRODUCING CONTAINERS Filed Oct. 24, 1932 2 Sheets-Sheet 2 aa/MK ATTORNEY Patented June 2,004,164 MEANS FOR PRODUCING. CONTAINERS: Otto Hofmann, Karlsbad; Czechoslovakia Application October 24, 1932, Serial No. 639,320

In Czechoslovakia July 22, 1932 1 Claim.

The present invention relates to the manufacture of containers, for instance suit cases, port manteaux made of mouldable by stamping or pressing.

leather or other material The im- 51 proved container according to the invention is characterized by the fact, that it is made of single piece of material, preferably without any seams. In the case of suit cases or portmanteaux,

both the cover and the main body of the 0011-.

tainer are'each made of one single piece of material. The container is manufactured according to the invention by pressing or stamping, a

suitable stamping or pressing machine having been designed for th e purpose.

Hitherto containers of a similar kind have been made by connecting together the various superficial parts of the container by sewing, gluing, cementing or riveting.

Small containers have indeed been made without a seam out of one piece of material, but in such cases only very thin material could be used and some of the superfluous material had to to form gussets.

be folded so as The containers made according tothe present invention have the advantage that they are water and dust proof and that all seams or joints are dispensed with. The containers also have very considerable strength and durability, as there is so danger of joints, seams or rivets becoming loose or undone.

Another advantage is the reduction in weight due to the fact, that the lining or reinforcing material may be dispensed with.

Containers made according to the invention may be very easily dyed or painted in their ready condition, particularly by the known spraying process, inasmuch as there are no folds, creases,

gaps or seams which may prejudicially affect the Fig. 1 is a perspec cover or lid,

tive view of a seamless case Fig. 2 is a perspective view of a seamless main case body,

Fig. 3 is a perspective view of the'complete suitcase.

Fig. 4 is a perspective view of a suitcase'body with inserted side wall fortravelling cases'or trunks. r

Fig. 5 is a perspectivevi'ew of a complete trunk provided withreinforcing members. Q

Fig. 6 showsdiagrammatically in sectional elevation means for making a container.

Fig. 7 is a plan View of the device shown in Fig. 6.

Figs. 8, to 10 are perspective views of various l0 constructions of an internal mould or core used in the manufacture of the container.

The containers, cases and like receptacles according to the invention may be provided in the usual manner with fittings, hinges, linings and 15 other parts or ornaments, and they may, if required, be provided with reinforcing members or parts. In some cases, for instance, in the case of very large trunks or cases, one or more of the side walls may be inserted as shown in Fig. 4. 20

The seamless production of the container parts is carried out by placing suitably softened, fulled, milled or otherwise prepared leather or other mouldable material upon an outer mould of a size corresponding to the size of the container 25 part to be produced, and by pressing the material by means of pressor or stamp into the mould. The container part thus shaped in the mould is then removed from the mould, dried, out to the required height and if necessary further 30 worked.

A machine suitable for the manufacture of the improved container comprises a core member a which has the internal dimensions and shape of the container to be produced, and an external 35 frame or die I), the internal measures of which correspond to the external measures of the container to be made. The edge a of the external mould should preferably be so shaped as to guide the material during the pressing or stamping op- 40 eration. The moulding frame 22 is preferably provided with reinforcing members (1 which give it the necessary strength and also serve as sup.- ports for placing the mould upon a suitably large bearing surface of the table of the press.

The manufacture is carried out as follows: A suitable softened, milled, fulled or otherwise prepared piece e of leather or other material is placed upon the mould frame b, which is fixed upon the open table of a slowly operating press. 50 The material is then pressed by the aid of the core a into and through the moulding frame 12. During the slow pressing process the material whilst being pressed into the moulding frame is 1 so distributed that it lies quite smoothly in the corners and edges and that no creases or folds are formed. The pressed or stamped piece of material is allowed to dry and harden upon the core a, whereupon it may be cut to the required height and further treated or worked.

The core and the outer mould or die may be made of any suitable material according to the material of which the container is made and. also according to the size of the material treated. Figs. 6 to 8 show a wooden core a which, as may be seen from Fig. 8, is provided holes g for the escape of air enclosed between the core and the work.

Figs. 9 and 10 show a core made of metalin sectional elevation and cross section. The core is made hollow and is provided inits bottom with air escape passages 9';

The core may also beprovidecl with a stencil or a pattern or inscription to be produced invthe same operation upon, the workpiece.

It will be understood that the described arrangement may also be reversed by using a mova- V ble outer moulding frame or rim and a stationary core or stamp The outer mould andvthe stamp or core may also be moved simultaneously.

It will be understood that various details of construction may be varied without departing from the scope of the invention. The reinforcing rib shown in Fig. 9 may be omitted if not required.

Having now particularly described and ascer- 7 tained the nature of said invention and in what manner the same is to be performed, I declare that what I claim is:

A machine for forming seamless leather suitcases, bags and satchels, comprising a core member having the shape of a suitcase and provided with openings for the passage of air, the crosssection of said core member being the same throughout the height thereof, a ring which is substantially smaller in height than said core member and the suitcase to be drawn, said core member being adapted to be inserted within said ring, the distance between the exterior surfaces of said core member and the inner surfaces of said ring being smaller than the thickness of the leather to be drawn, re-inforcing members connected with said ring at the exterior surfaces o'rro MHOFMANN.

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