Improvements in Doffer Mechanism for Ironing Machines.
Year: 1895

page_text: Date of Application, 23rd July, 1895-4ccepted, 7th Sept., 1895
COMPLETE SPECIFICATION.
Improvements in Doffer Mechanism for Ironing Machines.
We, EDWARD WATSON BUELL, and SIVERT MOE. of 395, Fifth Avenue,
Chicago, in the County of Cook, and State of Illinois, United States of America,
Gentleman, 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 certain new and useful improvements in ironing machines
and more particularly to doffer mechanism therefor, having for its objects among
others to provide a blade and mechanism whereby the goods are more positively
removed from the clothed roll. The doffer blade is arranged with its acting edge
located at a point more or less below the centre of the drum axis, it being well
known that the goods begin to fall away from the clothed roll just at a point below
its axial centre. To facilitate the goods in their movement away from the clothed
roll we employ means as an idler roll which is arranged with its periphery adapted
to bear against the clothed roll at a point between the acting edge of the doffer
blade and the centre of the drum axis; this will tend to concave the goods and the
lower edge thereof will thus be thrown farther away from the clothed roll and
turned outward to better fall upon the doffer blade and in position to be conducted
thereby between the other roll and its heated ironing device. In one of its forms
the doffer blade is made in sections and supported upon the heated ironing device
of the lower roll.
The idler roll may be dispensed with under some circumstances; the doffer blade
will serve with other devices for concaving the goods between the blade and the
centre of the drum axis.
Other objects and advantages of the invention will hereinafter appear and the
novel features thereof will be specifically defined by the appended claims.
The invention is clearly illustrated in the accompanying drawings, which, with
the letters of reference marked thereon, form a part of this Specification, and in
which :-
Fig. 1 is an enlarged view partly in section and partly in elevation, illustrating
the application of our invention.
Fig. 2 is an elevation, with a portion broken away, looking in the direction of
the arrow, in Fig. 1, of the doffer blade.
Fig. 3 is a top plan view of the doffer blade.
Like letters of reference indicate like parts throughout the several views.
A designates a portion of the ironing cylinder or drum which may be clothed in
any suitable manner, and B is the lower roll also of any well known or approved
form and adapted to be actuated in the usual way. Care the steam pans or ironing
devices also of known construction and mode of operation.
The doffer blade D is located at a point below the centre of the drum axis as
0 shown in Fig. 1 so that its acting edge or portion or portions will contact with the
roll or cylinder A at a point somewhat below said centre line, the exact distance
below such line being determined by experience and dependent somewhat upon the
diameter of the roll or cylinder. It is well known that the goods being ironed
begin to fall away from the drum vertically after they pass the centre line and the
5 acting face of the doffer blade is arranged so as to remove or disengage such articles
as do not of themselves leave the drum or cylinder as soon as the drum passes the
central line, the doffer blade being inclined toward the roll B as shown in Fig. 1 to
automatically guide the goods to the roll B as illustrated in Fig. 1.

page_text: It is desirable that some means be employed for aiding the goods in their
separation from the cylinder. For this purpose we have herein shown an idler
roller E suitably journaled and arranged so that its periphery will be in contact
with that of the cylinder A at a point between the acting face of the doffer blade
and the point where the goods would naturally leave the face of the cylinder, that
is, at the centre of the drum axis. This idler is designed to press upon the goods
and the covering of the roll or cylinder. A sufficiently to concave the same at this
point so that when the goods emerge therefrom their lower edge will be curved or
turned outward from the periphery of the cylinder A and in their further
movement will be deposited upon the doffer blade as will be readily understood.
The doffer blade is designed to be mounted in the machine in any suitable
manner, as for instance by means of bolts to the frame as indicated by dotted lines
in Fig. 3, and its upper and lower edges are slightly tapered and may be somewhat
curved in opposite directions as shown in Fig. 1 for the purpose of better con-
ducting the goods away from the cylinder A and to the roll B. The blade is
formed in sections in any suitable manner as for instance as indicated by dotted
lines in Fig. 3 and this blade is what may be termed a skeleton blade inasmuch as
it comprises the upper face from which depends the vertical ribs d, toward the rear
or that portion designed to be nearest the cylinder A and the vertical ribs d' upon
a different plane as seen in Figs. 1, 2, and 3, and the transverse ribs d³, the ribs d'
being designed to rest within the channel or groove b, in the heated ironing device C
as shown in Figs. 1 and 2, although the said ironing device may be otherwise
formed. The upper edge of the blade is formed at intervals with the lips d³ as seen
best in Fig. 3, which are designed to bear against the clothing of the roll or
cylinder to insure the positive removal of any goods that might perchance adhere
to the said cylinder. Owing to the length and enormous weight of the cylinders or
drums employed in this class of machinery it is most desirable to have a doffer
blade of such rigidity that it will not buckle or bend but will maintain its
parallelism with relation to the periphery of the drums at all times. The ribs
herein described are provided to insure this end.
Modifications in detail may be resorted to without departing from the spirit of
the invention or sacrificing any of its advantages. The idler roll E may be
supported in position in any suitable manner; it may be suspended so as to bear
against the frame from its own weight or any suitable devices can be arranged to
press it against the drum with any desired pressure.
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. The combination of a revoluble cylinder, a doffer blade and means interposed
between the blade and the horizontal axial line of the cylinder to turn the goods
from the cylinder between the doffer and the last ironing device, substantially as
described.
2. The combination of a revoluble cylinder, a doffer blade, and an idler roll
mounted to act against the cylinder above the doffer blade, as set forth.
3. The combination with a revoluble cylinder, of a doffer blade, and an idler roll
arranged to act against the cylinder between the said blade and the horizontal'
axial line of the cylinder, as set forth.
T 1
1005
1.