US2794393A - Plate blanks made of a material to be stamped - Google Patents

Description

.June 4, 1957 E, OSTWALDT 2,794,393

PLATE BLANKS MADE OF A MATERIAL TO BE STAMPED Filed May 11, 1955 Fig.1 I Fig.2

15'. Osiwaldt Horney;

Inventor:

United States Patent 1 2,794,393 PLATE BLANKS MADE OF A MATERIAL TO BE STAMPED Erich Ostwaldt, Berlin-Hermsdorf, Germany, assignor to Adrema Maschinenbau G. 111. b. H., Berlin, Germany Application May 11, 1953, Serial No. 354,006 7 Claims. (Cl. 101-369) This invention relates to an address-printing plate blank made of a material adapted to be stamped preferably provided with two reinforced guiding edges. It is usual to stamp on to these plates the text which is to be printed later on when the plates pass through an address-printing machine. To allow the address-printing plates to be stamped they are generally made of sheet metal. The stamping of such address-printing plates must often be changed there is the danger, especially with plates made of sheet iron, that the basic form of the plate is so changed that disturbances arise while the plates pass through the address-printing machine. The change of the basic form of the plate is caused by the fact that during embossing the types in the plates material displacements occur which result in local stretching or compressing of material at the embossing spots and thereby generate stresses in the plate which lead to warping of the plate.

The object of the invention is to avoid as much as possible such deformation during the stamping or restamping.

An essential feature of the invention consists in this that at least the area of the plate to be stamped is provided on the one side with elevations and with corresponding recesses on the opposite side, the recesses extending like a screen parallel to one another forming grooves the spacing of which amounts to fractions of the longitudinal dimension of the types to be embossed. Tests have shown that plates so constructed can be better stamped or restamped than plain plates. The plate according to the invention enables a shifting of the material during stamping or restamping without any substantial changes in the basic shape of the plate.

The elevations and corresponding recesses may have most varied shapes. They may for instance consist of spot recesses stamped close together or of a plurality of parallel recesses arranged side by side. This construction has the further advantage that the rigidity of the plate is increased.

The formation of the plate according to the invention is broadly suitable for any address-printing plates, but is particularly advantageous in the case of printing plates of sheet iron, where there is the danger of deformation when restamping is to such an extent, that they could not hitherto be successfully used. The invention can be successfully applied also to address-printing plates without folded over edges. It may even be applied to addressprinting plates of thermoplastic material for the production of address-printing plates.

Other features of the invention are hereinafter described.

The drawing shows by way of example an embodiment of the invention,

Fig. 1 being a plan view of an address-printing plate blank,

Fig. 2 being a side view of the address-printing plate blank according to Fig. 1, and

Fig. 3 is a partial section through the plate according to Fig. 1 in the direction of the line III-III and on an enlarged scale.

The illustrated address-printing plate consists of a strip of sheet metal of rectangular form. The longitudinal edges of the strip are folded over in a known manner so as to form guides 1 and 2. Between the two guiding edges 1 and 2 lies the area 3 to be stamped into which 2,794,393 Patented June 4, 1957 the text to be printed is stamped by relief pressing. The area into which the text is stamped is provided on the one side with elevations, corresponding recmses being provided at the opposite side, which form grooves extending on both sides of the plates parallel to one another like a screen which are spaced from one another by fractions of the lengthwise dimension of the printing types to be embossed. In the illustrated example of the embodiment the elevations and recesses consist of longitudinal wavy grooves 4 stamped into the said area (Fig. 3), about seven of such grooves being provided on one centimetre of the width of the area. The elevations and recesses may, however, also be produced in any other suitable manner, e. g. by stamping spot recesses arranged close together. The recesses may also consist of crosswise running grooves. The grooves have a depth corresponding to about half the thickness of theplate.

The invention is not limited to address-printing plates providing with guiding edges but may also be advantageously applied to flat address-printing plates.

What I claim is:

l. A reusable address printing plate comprising a body portion of relatively thick, substantially rigid, deformable material, the body portion being provided on one face with closely distributed projections of uniform height and on the other face with closely distributed depressions of uniform depth, the depressions on one face lying opposite the projections of the other face, and the projections and depressions being disposed at points spaced from the median line of the body portion so that when characters are stamped on the body portion, several projections and depressions are located within each stamped character and when pressure is applied to the stamped characters to remove the same, the depressions and projections are displaced thus providing planar surfaces on which further characters may be stamped.

2. An address-printing plate as claimed in claim 1, in which the profile of the plate consists of elevations and corresponding recesses forming grooves running parallel side by side.

3. An address-printing plate as claimed in claim 1, in which at least the area of the plate to be stamped is wavy profiled in the longitudinal direction.

4. An address-printing plate as claimed in claim 1, in which the elevations and corresponding recesses form spot recesses stamped close together.

5. An address-printing plate as claimed in claim 1, in which the elevations and corresponding recesses form crosswise running grooves.

6. An address-printing plate as claimed in claim 5, in which seven grooves are distributed over each centimetre.

7. An address-printing plate as claimed in claim 6, in which the depth of the grooves corresponds to about half the thickness of the material of the plate.

References Cited in the file of this patent UNITED STATES PATENTS 959,725 Dunc-an May 31, 1910 1,116,032 De Minico Nov. 3, 1914 1,151,401 Tomlinson Aug. 24, 1915 1,453,384 Duncan May 4, 1923 1,856,014 Allen Apr. 26, 1932 1,892,754 Tarbox Jan. 3, 1933 2,043,154 Damm June 2, 1936 2,091,976 Gollwitzer Sept. 7, 1937 2,166,226 Vehko July 18, 1939 2,330,572 Frey Sept. 28, 1943 2,645,178 Brainard July 14, 1953 FOREIGN PATENTS 388,443 Great Britain Feb. 7, 1933

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