A Paper-dust Collector for Printing Presses.
Year: 1890

page_text: COMPLETE SPECIFICATION.
A Paper-dust Collector for Printing Presses.
We, SAMUEL WESTACOTT MARVIN, CHARLES S. MARVIN, and WESLEY BURNETT,
Gentlemen, all of Cambridge, in the County of Middlesex and State of Massachusetts,
United States of America, do hereby declare the nature of our invention for "A PAPER-
DUST COLLECTOR FOR PRINTING PRESSES," 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 cylinder printing presses, and has for its object to provide
means for removing the lint and particles of dried pulp from the surface of the paper
tliat is supplied to the machine, and to accumulate such matter in a closed receptacle
so that it cannot be scattered through the machine. In all printing establishinents
employing cylinder presses much labour is caused by the accumulations of lint and
dried pulp falling from the paper, such accumulations covering the exposed surfaces
of the machine, adhering to such surfaces as are oiled and inked, so that much
difficulty is experienced in keeping the press properly cleaned and in keeping the
inked parts in condition to do good work.
Our invention consists first, in the combination with the paper supporting cylinder,
type-form and inking apparatus of a printing press, of a rotary brush arranged to
remove from the paper, as it passes over the cylinder, all loose particles of lint, dried
pulp, etc., that may be present thereon, and a receptacle arranged to receive from the
brush the particles removed thereby from the paper, thereby preventing the access
of said particles to the form and inking devices, and their adhesion thereto. The
invention also consists in certain details and combinations of parts, all of which we
will now proceed to describe and claim.
Of the accompanying drawings forming a part of this Specification,
Figure 1 represents a side view of the cylinder of a cylinder printing press, showing
our improvements in the relation they occupy to the cylinder:
Figure 2 represents an end view of the same.
Figure 3 represents a section on line 3, 3 of Figure 1.
Figure 4 represents a longitudinal section through the bed of the press, showing
the form and the inking rolls in their relation to the cylinder and to the paper cleaning
device.
The same letters of reference indicate the same parts in all of the figures.
In the drawings
a represents the cylinder of a cylinder printing press, and bb represent the supports
in which the same is journaled. The. cylinder and the other parts of the press may
be of the usual, or any suitable, construction, the press having suitable means for
holding and moving the type or printing surface, and means for inking the same.
We have shown in Fig. 4a reciprocating type-bed having the form A and inking
rolls BBCD arranged to ink the printing surfaces or characters of the form.
c represents a rotary brush composed of radiating bristles or brush material attached
to a shaft c which is mounted to rotate in bearings formed in plates or side pieces dd.
Said plates or side pieces are supported by a horizontal rod e, which in turn is sup-
ported by standards attached to the supports bb of the cylinder. The side
pieces d d are formed to constitute the ends of a casing which is provided with a
front piece d' extending from one side piece d to the other and attached to the side
pieces in any suitable way as, for example, by screws g, as shown in Fig. 2.
represents a drawer or box which is fitted to slide in guides on the inner sides of
the end pieces d d. When said drawer is closed its front or outer end forms a
continuation of the front piece d', as shown in Fig. 3.

page_text: The brush c is located above the drawer hand in the space between the front
piece and the cylinder a, the end pieces d d being at the ends of the brush. The
periphery of the brush bears against the sheet i of paper at a point where the said
sheet is supported by the periphery of the cylinder a, and above the point where the
paper is presented by the cylinder to the type form A which is supported and
reciprocated upon the bed of the press under the cylinder in the usual manner.
The cylinder is rotated in the direction indicated by the arrow in Fig. 2, and the
brush is rotated in the opposite direction by a suitable gearing connecting it with the
cylinder. We have here shown as the brush rotating gearing a gear wheel affixed to
one end of the cylinder, a pinion k mounted to rotate upon a fixed stud ni supported
by an arm or bracket n, and a pinion o affixed to the brush shaft c¹ and meshing
with the pinion. The arm or bracket is rendered adjustable by means of a stud
affixed to one of the side pieces and projecting outwardly therefrom through a
slot in the said arm or bracket n, and a washers which is pressed against the
arm or bracket n by a nut engaged with the threaded portion of the stud r. When
it is desired to throw the pinion & out of gear the nut is loosened and the arm n
swung on the stud as far as may be desired.
The described rotation of the brush causes the tips of its bristles to take up from
the surface of the paper any dust, lint, etc., that may be easily detachable therefrom,
and to carry such particles into the space at the bottom of which is the drawer h.
A plate or bar p is fixed to the side pieces d d and extends lengthwise of the brush
in contact therewith at a point opposite the line of contact of the brush with
the paper. Said bar is preferably of the concave form shown in Fig. 3, and is
preferably arranged to project inwardly toward the centre of the brush farther at
its rear edge 3 than at its forward edge 2, said rear edge being arranged to press
or bend inwardly the brush bristles so that as they pass from under the bar p they
will spring back to their normal positions with sufficient force to throw off the
particles of dust, lint, etc., that may adhere to them into the drawer h.
The matter removed from the paper is therefore deposited in the drawer by the
brush, and is prevented from being scattered upon the inking rolls, form, and other
parts of the press. Much labour is saved by this contrivance, and the press is kept
in a much neater condition than heretofore, and is adapted to do better typographical
work because the ink on the type is not clogged by lint, etc. from the paper.
The bar p may be adjustable to vary its pressure upon the brush, and to this end
we prefer to provide it with a shank p' which is hung upon a rod 4 affixed to the
side pieces d. Said shank has an arm 5 having a stud 6 at its outer end passing
through a segmental slot 7 in one of the end pieces d. Said stud may have a thumb
serew at its outer end by which it may be clamped or released. By swinging the
bar upon the rod 4 the edge 3 may be caused to press on the bristles with more
or less force; the bristles are, therefore, bent backwardly in moving from the edge 2
to the edge 3, and spring out after leaving the edge 3 so that they throw any
- particles of dust, etc., collected by them into the drawer, as above stated.
The sheet metal bands u, which extend over a portion of the periphery of the
cylinder a to prevent the paper dropping from the cylinder and striking the ink
rolls which ink the type, are attached to a rode which is affixed to ears formed
on, or attached to, the end pieces d d, said rod extending lengthwise of the cylinder
and passing through the rollers ac which are attached to the upper ends of the bands u.
Heretofore the bands u have been attached at their upper ends to the rod e affixed
to the standards, but to obtain space for the brush we have shortened said bands
and attached them to the lower portion of the casing in which the brush is located,
as shown. The lower ends of the bands are supported by a bar y affixed to the
bed of the press in the usual manner and extending across the same, the lower ends
of the bands having sockets through which the fixed bar y passes.
=
We prefer to attach an upwardly projecting plate a' to the front piece of the
brush casing, said flange or plate being arranged to arrest any particles of lint, etc.,
that may be thrown forward from the paper and cause said particles to drop onto the
brush which is located below said flange, as shown in Figures 2 and 3.

page_text: The brush is preferably adjustable toward and from the cylinder, so that its
pressure on the paper may be regulated and wear of its bristles compensated for.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. In a printing press, the combination with suitable printing mechanism including
a paper supporting cylinder, and inking mechanism co-operating with the printing
mechanism, of a rotary brush arranged to sweep the outer surface of the paper at
a point where the latter is supported by the cylinder, means for rotating said
brush, and a receptacle arranged to receive from the brush the matter removed
thereby from the paper, whereby the adhesion of such matter to the inked type and
the inking devices is prevented, as set forth.
2. In a printing press, the combination with the cylinders, the rotary brush,
bearings for the brush affixed to the frame of the machine, the fixed casing enclosing
the brush and provided with the movable drawer located under the brush and
adapted to be removed from the casing, and means for rotating said brush, as set
forth.
3. In a printing press, the combination with the cylinder, the type form or
printing surface, and suitable type inking mechanism, of the gear on the cylinder,
the rotary brush, the pinion o affixed to the shaft of the brush, the pinion communi-
cating motion from the gear to the pinion o, and the casing having bearings for
the brush shaft and for the pinion k, and the removable drawer. 'in said casing, as
set forth.
1000
SAMUEL WESTACOTT MARVIN.
CHARLES S. MARVIN.
WESLEY BURNETT.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicants.