Improvements in the Process of and Apparatus for Covering or Plating Articles with Metal, and for Producing and Plating such Articles of Sheet Metal.
Year: 1895

page_text: Date of Application, 3rd Dec., 1895
Complete Specification Left, 3rd Sept., 1896-Accepted, 2nd Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in the Process of and Apparatus for Covering or
Plating Articles with Metal, and for Producing and Plating such
Articles of Sheet Metal.
I, EUGEN JULIUS POST, of 16 Flandrischestrasse, Cologne, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention to be
as follows:-
The present invention relates to a process and apparatus for plating massive and
hollow articles of any kind and form.
The invention also comprises the production or preparation of the core and the
plating or covering of it at the same time or in one operation.
In the process carried on with this apparatus the junction of the edges of the
exterior casing or covering are such that splitting is avoided, the casing remains
hermetically upon the core, the edges folded inwards of the case are sunk in the
core so that the longitudinal seam is not visible on the outside or only visible
ou very close observation and hollow objects plated in this manner are completely
enclosed.
In the annexed drawing Figs. 1 to 8 (Sheet I) illustrate the process when the
core is ready formed.
The casing material which is to be used is in the form of bands of convenient
breadth and is put on with a series of instruments specially formed, so that it passes
through the stages shown by Figs. 2 to 8, so that it takes exactly the form of the
core on passing under the last instrument; all these instruments can be made up or
combined in one.
The joint must not be visible or only scarcely so that objects plated are not
distinguishable from those of solid metal.
In the method of plating the folded joint is pressed into a recess in the core, the
cross section of which recess corresponds to the thickness of the material of the
casing and also to the number of folds of the edges which are to be assembled.
Figs. 9 to 15 (Sheet 1) show some shapes of section which can be plated in this
manner. While in Sheet 1, Figs. 1 to 8, the instruments to be used are only
presented diagrammatically to show the folding of the casing from one form to
another up to the finished form.
Fig. 1 to 9 (Sheets II and III) represent an apparatus used to produce and
simultaneously plate a hollow tubular object; Fig. 1 is a horizontal and Fig. 2 a
vertical section of the apparatus, Figs. 3 and 4 a front and back view, Fig. 5 a
longitudinal section and Fig. 6 an under view of the central former, Fig. 7 shows
the tongue put in the central former, in view and section, Fig. 8 is a section on
line xx Fig. 1 looking to the right and Fig. 9 is a plan view of the mandrel.
The materials for producing the core and the casing are used in the form of bands.
The bands e and m wound on drums are carried by a frame at the end of the
apparatus; while for the core generally a material of small value is used, such as
iron, for the case a more costly material is used such as brass, nickel or silver.
The metal used for the case and that for the core should have the necessary breadth
and strength. The apparatus consists essentially of the formers a b and c which
can be fixed in a convenient manner and at suitable distances upon a frame.
The former 6 with an opening 60 which corresponds to the section to be produced
and which flares rearwardly carries a lengthening piece b¹ which has an opening b³,

page_text: which also flares rearwardly and runs into the opening 6° and serves for insertion.
and formation of the core from the band of iron e.
Under the opening 6° is another opening in which a block f is inserted, so that
between the upper edge of the block and the former 6 a space 63 remains
corresponding to the thickness of the covering.
This opening serves for passage of the band m for the casing and is so curved
that it brings the band towards the form ultimately required. While the
longitudinal edges of the core meet at the underside, a furrow e¹ is pressed in the
higher side of the core for which purpose the opening 6° carries a nose 6*. The
middle former consists of two halves a, a' one upon the other. The under half a
possesses a hollow, aº, which with the corresponding hollow in the upper half a¹ forms
a conical or tapered passage.
Whilst the hollow a' is completely smooth the hollow a² of the upper half a¹ of
the former has a projecting rib i (Fig. 6) curving laterally in section, tapering to
the front or outlet end of the former and gradually arising laterally on one side
of the triangular recess i¹. This recess receives the corresponding projection z¹ of
the tongue z which is inserted inside the former and is curved parallel with the
wall of the former so as to leave between its projection part 2 and the former a
space on each side corresponding to the thickness of the casing metal m within which
the two edges of the metal m move and following the shape of the parts are bent to
form engaging edges (see Fig. 8) which are brought to engage together by the
rib i and so issue from this former engaged together around the core e.
The mandrel d which is to be used to produce a hollow object and around which
the core is formed, receives on its upper side a furrow di in which the hollow
pressed in the core lies.
The mandrel possesses a head d², d³ the upper part of which connects with the
part 6 and the under part d³ lies against the higher edge of the space 63. This
head d² d³ facilitates the introduction of the material in band-form into the corre-
sponding opening of the former b. The third former c consists of two or more parts
which enclose an opening or passage diminishing a little to the front side and
intended to complete an hermetical pressing of the casing upon the core.
The two metal-bands e, m are led through the former b and then through the
formers a and c which are fixed at the necessary distance. In the former a by the
tongue and the construction of this former, the folding over of the longi-
tudinal edges of the casing and the pressing of the joint so formed into the furrow
of the core are effected.
Dated this 3rd day of December 1895.
HERBERT HADDAN & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Process of and Apparatus for Covering or
Plating Articles with Metal, and for Producing and Plating such
Articles of Sheet Metal.
4
I, EUGEN JULIUS POST, of Flandrischestrasse 16, Cologne, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention and in 4
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 a process and apparatus for plating massive and
hollow articles of any kind and form.
The invention also comprises the production or preparation of the core and the
plating or covering of it at the same time or in one operation.

page_text: In the process so carried on with this apparatus the junction of the edges of
the exterior casing or covering are such that splitting is avoided, the casing
remains hermetically upon the core, the edges folded inwards of the case are
sunk in the core so that the longitudinal seam is not visible on the outside or
only visible on very close observation and hollow objects plated in this manner are
completely enclosed.
In the drawings filed with my Provisional Specification Figs. 1 to 8 (Sheet 1)
illustrate the process when the core is ready formed.
The casing material which is to be used is in the form of bands of convenient
breadth and is put on with a series of instruments specially formed so that it passes
through the stages shown by Figs. 2 to 8 so that it takes exactly the form of the
core on passing under the last instrument; all these instruments can be made up
or combined in one. The joint must not be visible or only scarcely so that objects
plated are not distinguishable from those of solid metal.
In this method of plating the folded joint is pressed into a recess in the core,
the cross section of which recess corresponds to the thickness of the material
of the casing and also to the number of folds of the edges which are to be
assembled.
Figs. 9 to 15 (Sheet 1) of the said drawings show some shapes of section which
can be plated in this manner. (Fig. 14 showing also extra ornamentation
afterwards separately applied in any way.)
While in Sheet 1 Figs. 1 to 8 the instruments to be used are only presented
diagramatically to show the folding of the casing from one form to another up to
the finished form, Figs. 1 to 7 and Fig. 9 (Sheets 2 and 3) represent an apparatus
used to produce and simultaneously plate a hollow tubular object Fig. 1 is a
horizontal and Fig. 2 a vertical section of the apparatus. Figs. 3 and 4 a front
and back view. Fig. 5 a longitudinal section and Fig. 6 an under view of the
central former. Fig. 7 shows the tongue put in the central former in view and
section. Fig. 9 is a plan view of the mandrel. Fig. 8 of the sheet filed with the
present specification is a section on line - Fig. 2 on a larger scale.
The materials for producing the core and the casing are used in the form of
bands. The bands e and m wound on drums are carried by a frame at the end
of the apparatus. While for the core generally a material of small value is used
such as iron, for the case a more costly material is used such as brass, nickel, or
silver. The metal used for the case and that for the core should have the
necessary breadth and strength. The apparatus consists essentially of the
formers a b and c which can be fixed in a convenient manner and at suitable distance
upon a frame.
The former b with an opening 60 which corresponds to the section to be produced
and which flares rearwardly, carries a lengthening piece 6 which has an opening 62
which also flares rearwardly and runs into the opening 6° and serves for insertion
and formation of the core from the band of iron e.
Under the opening 60 is another opening in which a block f is inserted so that
between the upper edge of the block and the former 6 a space 63 remains corre-
sponding to the thickness of the covering.
This opening serves for passage of the band m for the casing and is so curved
that it brings the band towards the form ultimately required.
While the longitudinal edges of the core meet at the under side a furrow e¹ is
pressed in the higher side of the core for which purpose the opening 6° carries a
nose 64.
The mandrel which is to be used to produce a hollow object and around which
the core is formed receives on its upper side a furrow d' in which the hollow pressed
in the core lies.
The mandrel possesses. a head d² d³ the upper part of which connects with the
part 6 and the under part d³ lies against the higher edge of the space b³. This
head d d facilitates the introduction of the material in band form into the
corresponding opening of the former b.

page_text: The middle former consists of two parts a a¹ one above the other. The
Jower part a has in its upper surface a recess a forming with a similar recess a²
in the lower surface of the upper part a', a tubular passage way which gradually
tapers from the one end to the other being larger on the entrance side and
smaller on the exit side. In the upper part of this passage way from the
entrance side inwards is a recess i tapering to nothing about midway along the
passage and on one side of said recess there gradually arises a rib i projecting
into the passage way, said rib continuing to the end of the recess and thence
continuing to the other end of the passage way. This rib iis recessed on one
side, namely that nearer the recess ¹ so that the casing metal as it enters the
passage way may ride with one edge against the rib and have said edge (owing
to the narrowing of the passage way) forced against the rib and be thus turned
over inwards and caused to encircle the rib as shown at Fig. 8.
The recess aforesaid receives an equivalently shaped stem Z' of a tongue Z.
The upper face of the tongue is for the most part curved to lie parallel to
but not in contact with the walls of the passage way, a slight space being left
between the two on each side of the stem Z¹ and also along the tongue towards
its point as shown in Figs. 5 and 8.
Along the upper face of this tongue Z is a groove which commencing
imperceptibly about midway alongside of the stem Z' gradually deepens as it
approaches the end of the stem Z1 whence it runs straight to the end of the
tongue. During this latter part of its course it is coincident with and receives
the rib i, a slight space existing between the faces of the groove and rib.
The one edge of the casing band riding against the rib i is gradually bent
to curve inwards and then outwards, the other edge is gradually bent to curve
inwards. As the edges assume these forms they are brought one under the
other at the inner point of the stem Z' and (the narrowing of the passage
continuing) the edges are forced together and following their curvature already
given them they curl into one another more particularly as shown in Figs. 56
and 7 of Sheet 1, the result being to engage the edges loosely together.
The third former c consists of two or more parts which enclose an opening or
passage diminishing a little to the front side and intended to complete an
hermetical pressing of the casing upon the core.
The two metal bands e, m are led through the former b and then through the
formers a and c which are fixed at the necessary distance. In the former a
by the tongue Z and the construction of this former the folding over of the
longitudinal edges of the casing and the pressing of the joint so formed into
the furrow of the core are effected.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A process for plating hollow and massive objects of every kind and form by
preparing or making the core and simultaneously plating in one operation, the
edges of the casing being placed in a hollow of the core in such a manner that the
outside joint is practically invisible.
C
2. In the process claimed above the apparatus consisting of the blocks or
formers a b which are provided with corresponding openings, the former b
preparing the core and the casing, the former a with its tongue Z joining the
edges and closing the casing the former c pressing the casing upon and into
the core.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents for Applicant.