Improvements relating to Rotary Printing Machines.
Year: 1888

page_text: Date of Application, 3rd Feb., 1888
Specification Accepted, 9th Mar., 1888
of Paris, France.]
Improvements relating to Rotary Printing Machines.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
doscribed and ascertained in and by the following statonient :-
This invention relates to printing machines and has for its object to enable the use
of blank sheets in rotary machines as easily as in platen machines.
In order to obtain this result, I cause a sheet of unsized paper to pass upon the
pressing cylinder and below the side of the sheet which has already been printed. In
this manner the printed sheet is always applied upon a very clean surface. I do not limit
myself to this kind of paper alone as I may make use of any paper or tissue susceptible
of absorbing ink, such as unglazed or other paper tissue of any kind or the like.
said invention is represented in the accompanying drawings the figures of which are
hereinafter referred to.
The
In carrying the said invention into practice the paper to be printed which is wound
upon a roller A Figure 1 passes between a printing roller B and a pressing roller U
where it is printed on one side. From here it follows the way a bed and passes
between the pressing roller D and the printing roller E, where the second side is
printed. During its passage from one pair of rollers to another the impression
can be dried in various ways either of which is insufficient to give a very clear
impression.
Instead of causing the printed side of the sheet to pass directly upon the pressing
roller D I surround or nearly surround this pressing roller with a sheet of unsized
paper which is continually renewed. The machine of which Figure 1 is a diagram is
that which formed the subject of Letters Patent dated 7th March A.D. 1887
No. 3479.

page_text: 9
The unsized paper, tissue or the like is wound upon a delivery roller F from which
it is conducted in the direction f, to the pressing roller, and from thence-passing in
the direction hi is wound up again upon a receiving roller G, by the action of the
rollers HI which have a somewhat higher velocity than that of the paper to ensure
the pressing of the paper upon the receiving roller G.
With my arrangement the first printed side always passes upon a very clean surface,
and the most careful impressions can be obtained.
When all the paper of the delivery roller Fis unwound and has passed over the
pressing roller, it is wound upon the receiving roller G. If the said paper is not too
maculated, it can be used again, and several times in succession as long as it is not
charged with deposits. For this purpose it is sufficient to place the receiving roller G
in the place of the delivery roller F, and vice versa.
This process of printing with blank sheets is not very expensive, it necessitates
however the use of a certain quantity of unsized paper.
In another form or modification of the invention, shown in figure 2 I place upon
the three rollers A B C an endless apron a be which is applied upon one part of the
circumference of the second pressing cylinder between B and C and to which
is imparted continuous movement.
This cloth or endless apron is impregnated with paraffin or any other material that
dissolves ink. By reason of the continual contact of the impregnated cloth with the
pressing roller, all the ink which is deposited upon the latter by the printed side of the
sheet is dissolved, and the surface of this pressing roller, upon which the printed sheet
passes, is always kept perfectly clean and is always in contact with fresh portions
of paper.
The cloth or endless apron a be can be of any material, such as cloth or any other
fabric.
In a further modification of the said invention shown in Figure 3 the sheet of
unsized paper or other endless tissue or cloth a be passes around the second presser
roller D and around the tension roller R, and is sufficiently stretched thereby to be set
in motion by the movement of the pressing roller. This paper, tissue, cloth or other
absorbent material passes, as described and shown in the accompanying drawing
between the printed side of the sheet and the pressing roller, and thus is charged
with the excess of ink that is deposited. By this means perfectly clean impressions
are obtained together with greater neatness. When the endless band of unsized
paper, tissue, or the like is charged with ink, it is removed or replaced by another.
It is to be understood that the position of the tension roller can be modified according
to requirements.
According to another part of the said invention shown in Figures 4, 5 and 6
I place at each extremity of the printing roller a belt A, and below this belt I place
at points, determined according to requirements, small wooden wedges c.
This enables me to raise at the desired points the inking cylinder B, and therefore
to ink the printing roller more lightly. I make use of this means when it is desired
to print very light parts.
The wedges can be placed at variable distances at the two extremities of the roller
or at one or the other only.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed as communicated to
me by my foreign Correspondents I declare that what I claim is :-
First. The application of blank sheets to cylinder printing machines, for the
purpose specified.
Second. The application of a sheet of unsized paper or any other ink absorbing
-material-between the second pressing roller and the first side of the printed sheet aš
above specified.
Third. The method of winding upon rollers, unsized paper or the like, means for
actuating the rollers, and the arrangements of the said rollers.
Fourth. The method of cleaning the second pressing cylinder by causing it to pass.

page_text: continually against an endless apron of cloth tissue or the like impregnated with ink
dissolving material the said apron having a continuous motion imparted thereto, as
above described.
Fifth. The use of a sheet of unsized or other paper, tissue or other material, an
endless apron or the like which passes between the pressing roller and the side of the
sheet already printed, and which is carried away by the movement of the pressing
roller. The position of the tension roller and the direction of the endless apron
being variable according to requirements as above specified.
Sixth. The employment of belts at the extremities of the cylinders, enabling
wedges to be interposed to raise the inking cylinder at those points where only a small
quantity of ink is required as above specified.
Dated th: 2-1 1... of Hahn 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.