Improvements in Doctors for Frinting аспшев.
Year: 1896

page_text: Improvements in Doctors for Frinting
аспшев.
We, WILLIAM HUTTON, Machine Printer, and BENJAMIN HUTTON, Machine Printer,
both of Waterbarn Lane, Stacksteads, in the County of Lancaster, do hereby
declare the nature of this invention to be as follows:-
This invention is designed to provide a doctor for removing excess of color from
engraved printing rollers which will have the desired amount of flexibility and yet
have the two edges of equal thickness so that the second one can be used to clean
the roller when the first is worn out.
It consists essentially in forming the doctor with a groove or recess on one or
both sides which will reduce the thickness of metal and allow of it bending more
readily.
In carrying out the invention we construct the doctor from a blade or plate of
steel or other metal of about three inches wide or other convenient width. On one
or both sides preferably on the back we cut or form a groove of about 5/8ths inch
wide (more or less according to the width of the doctor). This groove we situate
about 1 inch from the bottom edge, one and three eighths inches from the top edge.
The groove or grooves may be cut, milled, ground, etched, or otherwise formed and
may be made single or double on one or both sides as may be found desirable.
We make the doctor in all gauges used by the calico printer the groove renders
it very supple and elastic and secures to the printer the advantage of a strong
doctor which can be used with much less weight than the ordinary strong doctor
thereby preventing a great amount of injury to the engraved rollers such as blotches
crossovers and pads.
A great advantage obtained by this doctor is that when about half worn it can be
turned while the suppleness and flexibility is maintained.
We are quite aware that doctors have been made flexible by making one edge
thicker than the other and such does not form any part of our invention.
Dated this 23rd day of November 1896.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
Improvements
We, WILLIAM HUTTON, Machine Printer and BENJAMIN HUTTON, Machine Printer,
both of Waterbarn Lane, Stacksteads, in the County of Lancaster, do hereby
Priced 1

page_text: 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 is designed to provide a doctor for removing excess of colour from
engraved printing rollers which will have the desired amount of flexibility and yet
have the two edges of equal thickness so that the second one can be used to clean
the roller when the first is worn out.
It consists essentially in forming the doctor with a groove or recess on one or
both sides which will reduce the thickness of metal and allow of it bending more
readily.
It will be fully described with reference to the accompanying drawings.
Fig. 1. Back elevation.
Fig. 2. Transverse section of same.
Fig. 3. Transverse section of a modification.
Fig. 4. Back elevation of another modification.
Fig. 5. Transverse section of same.
Fig. 6. Transverse section of another modification.
Fig. 7. Transverse section of another modification.
We construct the doctor from a blade or plate A. of steel or other metal of about
three inches wide or other convenient width. On one or both sides, preferably on
the back, as shown in Figs. I and 2 we cut or form a groove a of about 5/8ths inch
wide (more or less according to the width of the doctor). This groove wo situate
about 1 inch from the bottom edge, one and three eighths inches from the top
edge.
The thickness of metal of the doctor may be reduced by forming the groove or
grooves a in any desired position on either side of the plate, of which the following
are examples:-
(a) A single groove a formed in the back as in Figs. 1 and 2.
(6) A groove a, the back and a corresponding groove a¹ on the front as in
Fig. 8.
a on one side in Figs. 4 and 5.
(2) Two or more grooves & on one side and two or more similar grooves a³ on the
other side as in Fig. 6.
(e) One, two or more grooves a on one side and one, two or more grooves a¹ on
the other side the grooves on one side alternating with those on the other side as
in Fig. 7.
The groove or grooves a and a' may be etched, ground, milled or otherwise formed.
At present we find that etching and then grinding or polishing is the most suitable
way.
T'he doctor may be made in all gauges used by the calico printer. The groove
renders it very supple and increasing the flexibility secures to the printer the
advantage of a strong doctor which can be used with much less weight than the
ordinary strong doctor, thereby preventing a great amount of injury to the engraved
rollers such as blotches, crossovers, and pads.
A great advantage obtained by this doctor is that when about half worn, it can be
turned while the suppleness and flexibility are maintained.
We are quite aware that doctors have been made flexible by making one edge
thicker than the other and such does not form any part of our invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we 5
claim is.-
1. A doctor for printing machines, having a groove or grooves etched, ground,
or otherwise formed in one or both to increase the suppleness and flexibility thereof
without reducing the thickness of either edge, substantially as described.

page_text: 2. An improved doctor for printing machines substantially
shown.
1
1007
as described and
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.