Apparatus for Bronzing Printed, Lithographed, and other similar Surfaces.
Year: 1893

page_text: Date of Application, 17th Jan., 1893-Accepted, 4th Mar., 1893
COMPLETE SPECIFICATION.
Apparatus for Bronzing Printed, Lithographed, and other similar
Surfaces.
I, FRANZ FRANKE, of 33, Mauerstr., Berlin, in the German Empire, Manu-
facturer, 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 subject matter of the present invention relates to a bronzing apparatus,
which is superior to existing devices for the purpose, not only as regards simplicity
and ease of handling, but also in its clean and equal distribution of the bronze on
the object to be imprinted with same.
I will explain one form of my invention for hand use with reference to the.
accompanying drawings in which :
Fig. 1 is a front view,
Fig. 2 is a cross section on lines - in Fig. 3 and
Fig. 3 is an upper view and part cross section.
The whole device is enclosed in a box-like receptacle, made preferably of hard
wood or other similar material, and which receptacle consists of an upper part b
and lower part c.
The elastic rollers e e and the rigid roller h, provided with equi-
distant ring grooves and mounted between said elastic rollers e e, form the principal
feature of my invention. The roller h can be made out of any rigid material such
as hard wood or the like. The elastic rollers e e are coated with india-rubber or
any other elastic or gelatinous body and project from the apparatus under one
piece, being steadily pressed against the upper roller h by the spiral spring f. The
spiral springs are arranged under the bearings of the elastic rollers in the vertical
slot-guides of the under box c. The upper roller his stationary, being preferably
mounted between points in order to minimise the friction of the roller ends and thus
by this arrangement, the bearings of the elastic rollers need not completely encircle
this end, it being merely necessary to provide each with an under bearing as shown
in the drawings and preferably made of hard wood or the like. The bronze cistern
or receptacle a is mounted over the rigid roller h, being adjustable in a groove
closed at its upper part by a glass cover and narrowing underneath, funnel-like, in
a longitudinal direction. The sides and sloping headsides of the same are coated
with strips of felt which can be displaced on the sloping sides by means of adjustable
plates fastened by means of screw t. Bristles can be used instead of felt-strips if
required. The under edges of these felt or bristle discs stand direct on the rigid
roller and prevent the bronze being carried along other parts of the mantle or
shield as well as in the ring grooves of the said roller, the grooves thus being
always kept equally full.
The receptacle in which the whole of the apparatus is enclosed consists of two
parts, viz. the upper part 6 and the lower or under part c; the former contains
the rigid roller and the cistern containing the bronze, while the latter contains the
elastic rollers.
If the apparatus is to be worked by hand, the outer form should be made
convenient for gripping and guiding over the surface to be worked.
The apparatus can be made in various modified forms of different sizes, it being
merely necessary to change the form of the outer holder and the arrangement of
the inner mechanism accordingly.
Reversible brushes k are arranged in grooves on the side walls of the under box
part c, serving the purpose of removing, on the one hand, all dust and dirt from the
surface to be bronzed and to brush off, on the other hand, any bronze which may

page_text: have been laid on too thickly, said brushes being held in position by thumb
screws.
By the use of the afore-described bronzing apparatus all danger to health by
dust from the bronze is avoided by means of the glass plate closing the drum a,
which effectually prevents the dust flying.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is performed, I declare that what I claim is :
1. A bronzing apparatus in which the bronze passses from a cistern a into equi-
distant ring grooves of a roller made of rigid material and thence on to the
printing rollers e e made of elastic material and with which said roller h turns by
friction, the under edges of the bronze cistern a being provided with felt strips or
bristles whose action prevents the bronze passing in any other way than through
the ring grooves of the rigid roller keeping, at the same time, the quantity of
bronze always equal, substantially as described and shown in the drawings.
2. In a bronzing apparatus as set forth under Claim 1, the use of the device as
an independent hand apparatus or in connection with mechanical driving power and
forming the principal constituent of a bronzing machine.
Dated this 16th Tonus- 1902
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Agents.