Improvements in Machines for Applying Gum or other Liquid to Sheets of Paper or other Material.
Year: 1890

page_text: Date of Application, 20th Dec., 1890-Accepted, 24th Jan., 1891
COME LEIE DIDULATION.
Improvements in Machines for Applying Gum or other Liquid to
Sheets of Paper or other Material.
We HERMANN WIMMEL and AUGUST LANDGRAF both of Zinnerstrasse Hamburg
in the Empire of Germany Machine Manufacturers 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 relates to machines for applying gum or other liquid for the
superficial coating of sheets of paper or other material placed upon the machines. The
sheets are transferred from an adjusting table to a grasping device which is arranged
on the circumference of a metal cylinder. After the locking of this device which
grasps the edge of the sheet, the cylinder begins to rotate and carries along the sheet
on its periphery. Underneath said metal cylinder is a small roller journalled in the
frame of the machine which roller lies with part of its periphery immersed in a
vessel which contains the solution of gum or other liquid to be applied.
Whilst the sheet travels between the cylinder and the roller the latter transfers the
gum or liquid to the surface of the sheet. The coated sheet after the completion of
a rotation of the cylinder and after the grasping device has opened again is removed
from the machine and a new sheet is inserted under the fingers of this grasping
device when the rotation of the cylinder is repeated.
According to this invention in order to prevent the adjusting table from becoming
soiled by the gum or liquid the table is not placed quite close to the cylinder but
the front end of the rest for the sheet is formed of thin vertical metal strips or
projections which are fastened to the edge of the table and being placed at suitable
distances apart extend away from the edge of the table close to the cylinder. These
thin metal strips have but a small surface and therefore only very small quantities of
gum or liquid can adhere to the same when they come in contact with the gummed
sheets to be removed.
The adjusting table being directed towards the lower part of the cylinder gives the
advantage in combination with the intermittent motion of the cylinder, that the whole
circumference of the cylinder can be used except such part of said circumference as
is wanted for the arrangement of the grasping device so that sheets of a length
nearly equal to the whole circumference of the cylinder can be coated in machines
fitted with the improvements. In the accompanying drawing, those parts of a
gumming machine constructed according to this invention are represented. The
parts not shown do not differ from those of the known machines and the construction
of the same will be easily understood by any mechanic.
Fig. 1 is an end elevation in section through the upper part of the machine with
closed grasping device.
Fig. 2 is the same illustration with open grasping device.
Fig. 3 is plan of part of the adjusting table showing the above mentioned metal
strips.
In the machine frame H are journalled the sheet cylinder D and the gum roller a
to rotate the former above the latter.
The cylinder D is provided on its circumference with an elastic covering g made of
cloth, felt or other suitable material and it carries the grasping device which is
placed in a recess e of the cylinder surface and during the operating of the machine
closes (Fig. 1) and opens (Fig. 2) during each revolution of the cylinder in the
known manner. The roller a is partly immersed in the vessel containing the
solution of gum or other liquid. Tis the adjusting table upon the surface of which
is placed the sheet m to be gummed (Fig. 2) the edge of which sheet is to be inserted
between the fingers of the open grasping device and the edge of the cylindrical

page_text: surface. After the grasping device has closed, the cylinder D begins to rotate and
carries along the sheet which when arrived in front of the gumming roller a comes
in contact with the latter and receives the layer of gum. An adjustable brush p
placed against the roller a prevents the roller from taking up more gum etc., than
is necessary.
As may
be seen by Figs. 1 and 2 the front support for the sheet m is formed by
thin metal strips which are fastened to the plate of the table and project from the
front edge of the same early into contact with the cylinder D. In removing the
gummed sheet from the cylinder D it is unavoidable that said sheet comes into
contact with the front part of the table, but the thin strips take up in this instance
so little gum, that the next sheet m which is placed on the table does not suffer from
it. If on the other hand the complete edge of the table were to reach against the
cylinder D such a considerable quantity of gum would adhere to the same that the
next sheet would be spoiled, if the table plate as is the case with the older gumming
machines is not movable so that it could be moved from the cylinder during the
removal of the sheet. The construction of a movable table is complicated and not
required with the strips + 7.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we-declare that what we
claim is :
A machine for applying gum or other liquid to sheets of paper or other material
having a sheet cylinder D combined with a stationary adjusting table the lower edge
of which is provided with the strips or projections reaching close to the cylinder
as and for the purpose set forth.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.
'Qco1_1nqu25:1Jo Knn moz
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Dated this ven day of December 1000.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.