Improvements in Ink Ducts or Apparatus for Supplying Ink to Printing Machines.
Year: 1892

page_text: Date of Application, 13th Sept., 1892
Complete Specification Left, 13th June, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Ink Ducts or Apparatus for Supplying Ink to
Printing Machines.
I, THOMAS JOHNSON, of Nantwich, in the County of Chester, Printer and
Stationer, do hereby declare the nature of this invention to be as follows:-
This invention relates primarily to the ink ducts of multicolour machines for
supplying inks of different colours but it may also be applied to ordinary machines
where one colour of ink alone is used.
It is designed with the object of providing an appliance whereby the supply of
ink can be more easily and readily adjusted than by existing appliances and which
can be very readily cleaned when desired to renew or change the ink.
It consists essentially in constructing the separate ink ducts with a double screw
adjustment for each slide and with the slide pivoted so that it can be easily moved
clear of the sides of the duct in which it moves.
In carrying out the invention the ducts are made of a width corresponding to the
breadth of the line of colour desired. Each is made with two sides by which the
ink is contained and which fit closely against the duct roller the two sides being
secured together by suitable stays or bolts or a framework which holds them in
position.
The slide or sliding bottom of the duct I mount upon a pivoted stay or bracket
which is capable of rotating about its own axis so that the slide can be lifted and
completely removed from its position at the bottom of the duct. The sliding bottom
is connected with the pivoted stay or bracket by a double screw adjusting device.
The adjusting screw is provided with both an internal and external screw one of a
greater pitch than the other. The external screw fits into an internally threaded
hole in the bracket and into the internal screw of the adjusting screw fits the
screwed shank of the sliding bottom by this arrangement a sensitive adjustment of
the sliding bottom plate is obtained without any back lash the slightest movement
of the screw in either direction moving the slide.
Where the duct is broad in order to allow of adjustment of the quantity of ink
delivered at different points on to the duct roller two three or more of the sliding
bottom plates may be employed placed side by side between the two ends of the
duct by this arrangement each can be adjusted separately to the roller so that
when one line of type is more heavy than another requiring greater quantity of ink
the ink so required can be allowed to flow out in the desired quantity at one point
while less ink is delivered where the greater quantity is not required.
Dated this 19th day of Sentember 1892.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Ink Ducts or Apparatus for Supplying Ink to
Printing Machines.
I, THOMAS JOHNSON, of Nantwich, in the County of Chester, Printer and
Stationer, 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 primarily to the ink ducts of multicolour machines for
supplying inks of different colours but it may also be applied to ordinary machines
where one colour of ink alone is used.

page_text: It is designed with the object of providing an appliance whereby the supply of
ink can be more easily and readily adjusted than by existing appliances and which
can be very readily cleaned when desired to renew or change the ink.
It consists essentially in constructing the separate ink ducts with a double screw
adjustment for each slide and with the slide pivoted so that it can be easily moved
clear of the sides of the duct in which it moves.
It will be fully described with reference to the accompanying drawings,
Fig. 1. Longitudinal sectional elevation.
Fig. 2. Plan.
The ducts are constructed with two side plates A between which the ink is
contained and of a distance apart corresponding to the breadth of the line of colour
desired. The sides A forming the duct are secured together by stays a rivetted
thereto and the curved ends fit closely against the duct roller to regulate the
delivery of the ink or colour only over the desired space the duct being held in
position by the point of a screw bearing against the hollow in the back stay B.
The slide or sliding bottom C of the duct I mount upon a pivoted stay or
bracket D which is capable of rotating about its own axis so that the slide can be
lifted and completely removed from its position at the bottom of the duct for
facilitating the cleaning of the ink or colour from the inside..
The sliding bottom C is connected with the pivoted stay or bracket by a double
screw adjusting device. The adjusting screw E is provided with both an internal
and external screw one of a greater pitch than the other and the shank c of the
slide C is screwed to correspond with the internal_screw. The external screw fits
into an internally threaded hole in the bracket D and the internal screw of the
adjusting screw E receives the screwed shank c of the sliding bottom, by this
arrangement a sensitive adjustment of the sliding bottom plate Cis obtained."
Where the duct is broad in order to allow of adjustment of the quantity of ink
delivered at different points on to the duct roller two, three or more of the sliding
bottom plates may be employed placed side by side between the two ends of the
duct, by this arrangement each can be adjusted separately to the roller so that
when one line of type is more heavy than another requiring a greater quantity of
ink the ink so required can be allowed to flow out in the desired quantity at one
point while less ink is delivered where the less quantity is required.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An ink duct or apparatus for supplying ink to the rollers of printing machines
constructed with a sliding bottom adjusted by means of a double screw the external
screw fitted into a pivoted bracket and the internal screw constructed to receive
the screwed shank of the slide substantially as described.
2. In an ink duct the combination with the sliding bottom of the pivoted bracket
to hold the adjusting screw, and the adjusting screw fitted therein with external
and internal screw threads with the latter of which the shank of the slide engages
substantially as and for the purposes described.
3. An ink duct constructed either with one or with two or more sliding bottoms
arranged and adjusted substantially as shown and described.
www
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.