Improvements in and in the Manufacture of Sheet Metal Edging or Framing for Pictures and Placards.
Year: 1893

page_text: Date of Application, 4th Dec., 1893-Accepted, 13th Jan., 1894
COMPLETE SEROITIATION.
Improvements in and in the Manufacture of Sheet Metal Edging
or Framing for Pictures and Placards.
I, AUGUSTE STEINBRINK of 5 Seestrasse Dresden, in the Kingdom of Saxony,
German Empire, Merchant, do hereby declare the nature of this invention, and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The present invention relates to the manufacture of sheet metal edging for
placards and pictures, not as heretofore by stamping or embossing, but by means
of rolling the strip of metal, whereby the placard itself is held tightly either by
the friction of the roll, or by extra embossments made in the same. A metal
edging provided with a hollow cylindrical roll made as described below, offers
great resistance to bending and at the same time economy in material, as against
all other known edgings.
The object in view is to produce an edging with as little material as possible
but which shall at the same time possess a very high power of resistance against
being indented or bent. For this purpose the inventor makes use of the apparatus
described below.
Figs. 1, 2, 3, and 4 show edgings which hold the placards firmly by means of
the friction of the rolls formed with the same. It is immaterial which side of
the edging is made to appear to the front of the picture.
Figs. 5 and 6 are front and side views and Fig. 7 a section and plan of the
apparatus used.
Figs. 7 and 8 illustrate the method of rolling the metal strip itself.
To both sides of the plate a mounted on a frame or table are attached two.
guiding prisms bb, serving as guides for the pressure-plate C. Excenter-
levers d d are mounted on suitable spindles, and are in moveable connection with
the pressure-plate C, so that on moving the hand-levere the plate is made to
advance. A ruler stretching lover the whole length of the plate a serves to hold
the metal strip firmly in position. This ruler can, as shown in the drawing, be
pressed up or down on to the strip by means of a foot-lever hh.
The plate a is provided with a rest g against which the strip comes to lie and
which in respect to height is chosen according to the thickness of the strips.
can be sunk when required and made to rise again under the influence of a
spring. The stuff which is to be rolled with the strip is laid with one edge on
the same and held firmly by the ruler f. The pressure plate C is provided with
a steel half-cylindrical hollow matrix K. On the plate C being moved against
the metal strip held down by the ruler, the strip, which must have one edge
slightly bent, passes into the hollow of K and forms itself into a hollow cylindrical
edging with the placard or picture.
Different sizes of matrices K can be kept ready for rolling edgings of various
diameters.
The strip may be further, previously provided with a saw edge, or with
embossments punched out; this produces an increased friction between the strip
and the placard or picture.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is,
1. An edging for placards or pictures consisting of a strip of sheet metal rolled
into a hollow cylindrical form, the edging being attached to the placards by rolling

page_text: the two together, substantially as herein described with reference to the accom-
panying drawing.
2. For producing an edging as described under 1, an apparatus consisting of a
plate a, of excenter-levers d d, pressure-plate C with a half-cylindrical hollow
matrix K and holding ruler f, the whole substantially as described with reference 5
to the accompanying drawing.
Dated this 1st day of December 1893.