Method of and Apparatus for the Manufacture of Blotting Paper.
Year: 1893

page_text: Date of Application, 25th Apr., 1893-Accepted, 27th May, 1893
COMPLETE SPECIFICATION.
Method of and Apparatus for the Manufacture of Blotting Paper.
I, GUSTAV LUDWIG Jaeger, of Maywood Avenue, Maywood, in the County
of Bergen and State of New Jersey in the United States of America, 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 aud by
the following statement :-
My invention has reference to the manufacture of bibulous paper from ordinary
paper, preferably unsized paper as delivered from the machine; and it has for its
special object the manufacture, at a low cost, of commercial blotting paper which
shall have the appearance and possess all the essential qualities of the paper made
by the more expensive and slow processes now in use. To this end my invention
consists in subjecting the stock repeatedly to an indenting action, as distinguished
from a mere fluting or bending action, to disturb, loosen and separate the fibres
throughout the body of the paper, whereby it is rendered highly absorbent, and
coincident therewith the paper is rendered very pliable, all of which is more fully
pointed out in the following Specification and claims and illustrated in the
accompanying drawings, in which ;
Figure 1 represents a side elevation of a machine constructed for the manufacture
of blotting paper according to my invention.
Figure 2 is a plan or top view of the same.
Figure 3 is a vertical section in the plane xx Figure 1.
Figure 4 is a longitudinal section through one of the sets of stamps and dies,
said figure being drawn to a larger scale than the preceding figures.
Figure 4* is a cross section in the plane y y, Figure 4.
Figures 5, 6, 7 and 8 are face views of portions of the several dies, drawn to a
larger scale than Figures 1. 2. 3.
Figure 9. is a side elevation of a machine embodying rolls, in place of stamps
and dies.
Figure 10 is a plan or top view of the same, parts of the upper rolls being
broken away.
Similar letters indicate corresponding parts throughout the several views.
In these drawings, referring at present to Figures 1, 2 and 3, the letter A
designates a suitable base supporting standards B B provided with bearings for a
number of eccentric shafts and C³, which are connected together by
suitable gear wheels a. On one shaft, as C³, is mounted a driving pulley D for
imparting motion to said shaft, and consequently to the remaining shafts by the
connecting gears. E E' E' and E³ designate the stamps which have a reciprocating
motion imparted thereto by the eccentric shafts, and F F1 F2 and F3 are the dies
located below and in line with the said stamps. These dies are supported upon
suitable set screws b so that they can be adjusted with respect to the stamps, and
are guided by suitable means such as the screws c passing through slots at the
opposite ends of the dies and entering the base A. G G₁ are feed rolls for
drawing the paper through the stamps and dies, the same being rotated by suitable
means. In this instance the upper roll G is actuated from the shaft C by a crank d,
link e and arm f, the latter carrying a pawl g, engaging with a ratchet wheel h on
the shaft of said roll. The shaft of the lower roll G' is driven from the upper
roll by gears i and j. is a guide roll for the paper.
At the opposite end of the machine are secured brackets (broken away),
which have bearings as usual for the support of the roll of paper; m is the
guide roll.
The dies F and the lower parts of the stamps are made of steel.
Referring to Figures 4 to 8, it will be seen that the working faces of the stamps

page_text: and dies are formed with numerous small projections as s and recesses as s', the
same being formed therein either by milling, cross cutting or in any other suitable
manner, preferably however by cross cutting with a diamond pointed tool. In
practice I make the milling on each set of the stamps and dies precisely alike so
that the paper is worked up from both sides. The stamps and dies are set into the
machine to cause the projections and recesses to mesh when said stamps and dies
are brought together, whereby numerous small indentations and protuberances are
formed throughout the body of the paper; in other words the body of the paper
is pushed in and out from both sides in small portions, whereby its fibres are
disturbed and loosened.
This effect can be increased by gradually decreasing the magnitude of the
projections and recesses in the successive stamps and dies to the action of
which the paper is subjected, or vice versa, by gradually increasing the magnitude
of the projections and recesses.
In the example illustrated I make use of four sets of stamps and dies, however
more or less could be used; but I have found that this number does the work very
successfully.
The first set of stamps and dies E F to which the paper is subjected (Figure 8)
is somewhat coarse, having about eight projections to the inch; the last set E³ F³
has about 32 or more projections to the inch, while the intermediate sets E¹ F¹
and E F are milled or cross cut in proportion. Of course departures can be
made from the sizes given. If desired the recesses may be made somewhat larger
than the projections, in order to avoid undue compression of the paper, or the same
object may be attained by so setting the dies that there shall be a clearance
between the same and the stamps when the latter are at the lower end of their
strokes.
The stamps are run at about 300 strokes per minute, while the speed of the paper
is about from 18 to 20 inches per minute.
To lessen the power required and also the strain on the machine, the eccentric
shafts are preferably set to cause the stamps to act in succession on the paper, and
not at one and the same time.
While I prefer to use stamps and dies as being more rapid in working up the
fibres of the paper, rolls provided with faces similar to the stamps and dies may be
used. Such a machine I have illustrated in Figures 9 and 10, in which H H², H'H³
and H H designate the embossed or milled rolls mounted in bearings in
standards B of the base A. The shafts of the rolls are connected by gear
wheels a¹ and a² and driven by the pulley D¹ mounted on the shaft of roll H*.
61 are the set screws for adjusting the upper rolls with respect to the lower.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The herein described method of manufacturing blotting paper, which consists
in subjecting the stock repeatedly to an indenting action, in distinction to a mere
bending action.
2. The herein described method of manufacturing blotting paper, which consists
in subjecting the stock simultaneously and repeatedly on both sides thereof to an
indenting action gradually varying in fineness.
3. A machine for the manufacture of blotting paper according to Claims 1 and 2,
consisting of a series of stamps and dies (or rolls) provided with indenting faces
gradually varying in fineness, and means for imparting motion to said stamps
(or rolls).
GUSTAV LUDWIG JAEGER,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.