Year: 1887

page_text: We, CARL HEINRICH PAUL DORNBLUT, FRIEDRICH EDUARD LANG, and MAX
HERRMANN MELLY, all of Anger, near Leipzig, in the Empire of Germany, Manu-
facturers, 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 :-
This invention consists in an improved roller for transferring ink or colour to
designs, type etc. in printing presses and more especially for use in lithographic and
zincographic printing.
For this purpose leather cylinders have generally been used, these however have
several drawbacks. For instance the leather surface generally lacks evenness owing
to the inequalities produced in graining the leather, so that the transfer of ink or
colour to the design is deficient and unequal; thus it is found that only about half
the cylinders prepared are equal to the purpose. Again, the leather expands in use,
so that it becomes loose on its support and the rollers lose their solidity. The leather,
futhermore, is liable to take up water from the lithographic stone or the like during
the process, and thereupon to become smooth and slide over the designs etc., thereby
tending to smudge the same or impair the outlines. The leather cylinder is also
generally stuffed or backed with flannel, and the latter sucks up any ink or color that
may permeate the leather, becoming bard, and thus depriving the roller of its
elasticity.
The improved cylinder or roller is formed of or with a surface of specially prepared
felt as hereinafter described.
The improved felt cylinder is intended to remove the aforesaid inconveniences. It
surpasses the leather in durability and also in grain or surface. The felt cylinder
does not expand like leather and is not altered by impregnation with color. Further-
more, the action of water on the felt does not cause it to slide over the design to the
detriment of the latter.
The improved cylinder is moreover provided with an impermeable layer between
the felt outer casing and the backing of flannel or the like, where such backing is used.
The ink therefore cannot pass to impregnate such backing, and the latter therefore
lasts longer than would otherwise be the case.

page_text: The improved roller consists of a roller or cylinder of wood or metal, the same
being if desired covered with flannel and the protecting layer aforesaid and over this
the prepared felt, or in place thereof, with prepared felt only.
The backing, where such is used, may be of flannel or cloth wound about the roller,
the protecting layer being of oil-silk, oil-cloth or waterproofed fabric of convenient
nature.
The felt layer is saturated with a mixture composed of substantially equal parts of
refined beef tallow, copal-lac and varnish, the said substances having been well mixed
and stirred in an equal quantity of turpentine oil.
The roller when dry is ground and smoothed.
Having now particularly described and ascertained the nature of said invention,
and in what manner the same is to be performed, we declare that what we claim is :-
1. In ink or color rollers for printing, a surface composed of felt saturated with a
mixture of beef tallow, copal-lac, varnish and turpentine oil.
2. In ink or colour rollers for printing, the combination with a surface material for
the reception of such ink or color, of a layer thereunder impervious to the passage of
such ink or color.
Dated this 3rd day of October 1887.
C. H. P. DORNBLUT.
F. E. LANG.
M. H. MELLY.
By Herbert & Co.,
18, Buckingham Street, Charing Cross, W.C.,
Agents to Applicants.
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