Improvements in Machines for "Dusting" Tin and Terne Plates.
Year: 1890

page_text: Date of Application, 26th Aug., 1890-Accepted, 5th Dec.. 1890
COMPLETE SPECIFICATION.
Improvements in Machines for "Dusting" Tin and Terne Plates.
I, JAMES ABBOTT, of Chapel Terrace, Blaina, in the County of Monmouth, Engineer,
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 "dusting" tin and terne plates, that is to
say, for removing bran, grease and other matter from the faces of such plates
after they have been "dipped" or passed through bran or sawdust, as is well
understood.
This invention consists, firstly, in simplifying the driving gear of dusting machines
and in so arranging the said gear that the dusting rolls are rotated against each other,
that is to say, their contact surfaces move in opposite directions. The driving gear
is all placed at one side or end of the machine. As a consequence of rotating the
dusting rolls in the same direction the wool or nap of the dusting skin on each roll is
rubbed by the other when no metal sheet is passing between them. Accordingly, the
skins tend to keep one another brushed and cleaned.
A second improvement comprised in this invention consists in making the feed and
delivery rolls interchangeable, the spindle ends of the rolls being of such length at
each end as to enable interchange, and so to equalize tear and wear on the india-
rubber envelopes of the rolls.
This invention further consists in the provision of a guard which, besides serving as
a means of protection to the operatives feeding the plates into the machine, prevents
the wool on the skin enveloping the upper dusting roll from rising immediately after
freedom from contact with the lower roll. This facilitates the introduction of the
plates between the dusting rolls and prevents buckling in plates baving. uneven
or rough leading edges.
In the accompanying drawing, Fig. 1 represents a plan of a tin and terne plate
dusting machine constructed and arranged in accordance with this invention.
Fig. 2 represents an end view at the line A B, Fig. 1. Fig. 3 is a section.
On the shaft a, which extends inwards to the frame only, are carried the loose
pulley c and fast pulley d, Fig. 1. Keyed on the shaft a is a pinion e the inner half
of which gears with the pinion above it and the pinion.g below it. The pinion fis
fixed on the spindle of the upper dusting roll h, and the pinion g on the spindle of the
lower dusting roll i. As indicated in the drawings by arrows, the dusting rolls and i
rotate in the same direction, their contact surfaces moving in opposite directions.
The outer half of the pinion e gears with the toothed wheel k, keyed on the spindle
of the lower feed roll o, and with the toothed wheel n keyed on the spindle m of the
lower delivery roll p.
The plates to be dusted are inserted by hand between the feed rolls o, o¹ and by
them are impelled between the dusting rolls and i to the delivery rolls p p' by which
they are delivered on to the shelf or table g, Fig. 3. By rotating in the same
direction the dusting rolls brush and cleanse one another at such times as a sheet does
not intervene between them. The spindle of each feed and delivery roll is at one end
longer than at the other, as seen at Fig. 4 which represents a side view of either the
feed or delivery rolls.
Accordingly, the feed and delivery rolls are interchangeable, it being only
necessary in interchanging that the position of the ends be reversed and the spur
wheels . n removed from one end and fixed on the other. By virtue of this inter-
changeability of the feed and delivery rolls tear and wear of the india-rubber
coverings of the rolls may be more equalized.
In contact with the upper dusting roll is one edge of a guard which extends

page_text: along the roll and covers it. This guard serves to protect the operative engaged in
inserting the plates between the feed rolls and it keeps down the wool nap of the
sheepskin of the roll at or near the point where the plates come into contact with
the roll. It facilitates the passage of the plates to the dusting rolls and prevents
crumpling up" or buckling of the plates.
"
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a machine for dusting tin and terne plates, the arrangement of gearing
herein before described for rotating the rolls, that is to say, in which the said gearing
is all placed at one end or side of the machine and is operated without the inter-
vention of belts or chains further than the belt employed for the driving pulley.
2. In a machine for dusting tin and terne plates, the arrangement of driving
gear hereinbefore described operating to rotate the dusting rolls in the same direction
(their contact surfaces consequently moving in opposite directions), as and for the
purposes set forth.
3. In a machine for dusting tin and terne plates, making the feed and delivery
rolls interchangeable by adjusting the length of the spindles at each end so that each
may lie in the other's place when the position of the ends is reversed, substantially as
herein before described.
4. The provision in a machine for dusting tin and terne plates, of a guard such as r
for keeping down the nap of the upper dusting roll and thereby facilitating the
passage of the plates to the dusting rolls, and for protecting the operative in
inserting the plates between the feed rolls, substantially as hereinbefore described
with reference to the accompanying drawings.
5. The combination of parts constituting the improved machine for dusting tin and
terne plates, constructed, arranged and operating substantially as hereinbetore
described with reference to the accompanying drawings.
Dated this 25th day of August 1890.
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.