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Патент USA US3097818

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July 16, 1963
A. T. WILLIAMS
3,097,808
EXPANSION CHUCK
Filed Aug. 21, 1961
H'rf‘hur '1: Williams
INVENTOR.
1
BY
,mam/m
HHgs.
United States ‘Patent 0 " lC€
3,097,8081 .
Patented‘July 16, 1963‘
1
2
3,097,808
enough to hold the section without rupture. Outwardly
of the expansible section is a centering port-ion, in the‘
EXPANSION CHUCK
Arthur T. Williams, Camas, Wash, assignor of one-half
to Charles R. Tidland, Camas, Wash.
Filed Aug. 21, 1961, Ser. No. 132,765
3 Claims. (Cl. 242-682)
form- of a rigid, frusto-conical section, bounded by a sur--'
face that ?ares, progressing away from the expansible'
section, or outwardly toward the extreme end of the roll.
This section is only a minor portion of that part of the
chuck that is inserted into the roll. Adjacent the center
This invention relates generally to chucks, and more
ing portion is an annular flange, that serves to limit the
particularly to a novel expansion chuck for mounting
extent that the chuck is inserted into a roll, and thus the
10 extent the centering portion ?ts Within the roll end. The
the end of a hollow roll.
KIn the handling of such articles as paper rolls, where
elements are so proportioned that the primary ‘function
the roll may comprise a core made of material such as
of the ifrusto-conical section is to produce centering, and
"wood or cardboard and an elongated continuous strip
pressure actually for holding the roll is primarily derived
from the expansible section.
‘of paper wound on the core, chucks are sometimes em
ployed that are inserted into opposite ends of the roll 15
These features and objects, as well as other objects and
and hold the roll. The chucks may be journaled on
advantages, are attained by the invention, and the same
suitable supports, and with the chucks in place they ro
is described hereinbelow in conjunction with the accom
tatably support the roll ‘for such operations as unwind
panying drawings, wherein:
ing the paper therefrom. This invention relates to im
FIG. 1 illustrates, in perspective, a roll stand, of the
provements in such chucks, i.e., chucks constructed to 20 sort that may be used for mounting a roll of paper dur
hold a hollow roll by exerting pressure radially out
ing the unwinding of paper therefrom, such stand in
. wardly on theinside of the roll adjacent its ends. Al
cluding opposed and spaced-apart insert-able chucks con~
‘ though the chuck of the invention is described in con
structed according to an embodiment of the invention;
nection with the handling of paper rolls, it should be
FIG. 2 is a side view of a chuck, ‘drawn in an enlarged
obvious that its use is not so strictly limited, and that the 25 scale, and with portions broken away and in section bet
invention relates to chucks ‘for handling any type of roll,
ter to illustrate the chuck, the ?gure further illustrating
where their purpose and function are similar.
The usual chuck has a tapered body, and this is forced
endwise into the hollow center of a roll until the chuck
how the end of a roll of paper is held on the chuck; and
FIG. 3 is an end view of the chuck illustrated in
is wedged ?rmly in place. There have been difficulties
experienced in using such chucks, however. Rolls of
Referring now to the drawings, and with particular
reference initially to FIG. 1, a paper roll stand is indi
cated at 10. The stand comprises a frame 12, and jour
naled on upstanding portions 14, 16 of the frame, an
elongated, tubular mounting structure 18. Supported on
mounting structure 18, and movable lengthwise thereon,
paper often have considerable mass, and to assure that a
\FIG. 2.
’
roll is held with proper ?rmness, chucks have been driven
into the ends of a roll so solidly that frequently rupturing
of the core and overlying wraps of paper has occurred.
Aside from the economic disadvantage involved in darn
are a pair ‘of arms v20, 22. These are suitably keyed to
age to the paper and core, such rupturing may also affect
structure 18, so that while they are movable longitudi
proper centering of the roll on the chucks. Proper cen
nally of the structure, they are fixed from rotation rela
tering is extremely important, as a roll of paper often
tive to structure 18.
40
is rotated during handling at a relatively high speed, and
At 26 there is indicated a motor, and such is oper
has ‘considerable mass, and without proper centering
atively connected to the ends of a pair of threaded shafts
troublesome gyrations in the roll result.
28, 30, so that when the motor is energized, the shifts
A general object of this invention is to provide an im
are rotated. The ends of these shafts opposite the ends
proved insertable chuck :for holding the end of a roll, 45 connected to motor 26 are free of any support. Shaft
that is effective to hold the roll with the roll properly
28 between its ends extends through an internally thread
centered and solidly on the chuck, and to do so without
ed lower portion of arm 20, and on rotation of the shaft
exerting stresses on the roll such as are likely to cause
by the motor, arm 20 is moved longitudinally on struc
rupturing and fracture of its core and material wound
ture ‘18, to the left or to the right, depending upon the
thereon.
50 direction the shaft is rotated. Shaft 30 extends between
Another object of the invention is to provide an im
its ends through a similar internally threaded lower por~
proved chuck comprising the novel combination of an
tion of arm 22, and rotation of shaft 30 produces move
expansible portion, and a slack take-up device spaced
therefrom, with the two operable together with the chuck
ment of arm 22 longitudinally on structure 18.
The arms 20, 22 are swingable about an axis coinciding
in place to hold a roll without rupturing of its end.
55 with the center of structure 18. To swing the arms from
More speci?cally, it is an object ‘of the invention to
the raised position shown to a lowered position (out
provide an insertable chuck, having mechanism for grip
toward the viewer and down in FIG. 1), a ram 32 is pro
pingl-frictionally the inside of the end of a roll by ex
vided, which is connected to an arm 34 ?xed to one end
of structure 18.
pansion, with such spaced inwardly somewhat from the
On the free end of each arm is mounted an expansible
end of a roll with the chuck in place, and having ad 60
ditionally novel means for centering the roll spaced to
chuck, indicated generally at 40. The two chucks are in
axial alignment. Each is insertable into the hollow end
ward the end of the roll ‘from where the roll is gripped
frictionally.
of a paper roll, such as the roll shown in dashed outline at
41. The chucks then may be actuated to grip the ends
Thus, a chuck of this invention features an expansible
section, positioned on the chuck so that with the chuck 65 of the roll and hold it solidly. The chucks are secured to
inserted into the end of a roll and upon expansion of
mountings 42, and these‘ in turn are journaled in the free
the section, pressure is exerted radially outwardly on the
ends of arms 20, 22. A roll of paper held by the chucks
inside of the roll over an area located inwardly (from
the extreme end of the roll. Because this area is lo
is rotatable about its longitudinal axis, to permit unwind~
ing of paper therefrom. A motor mounted on arm 22
cated inwardly from the extreme end of the roll, there 70 is indicated at 44. Motor 44 is connected to the mount
is no tendency for the roll to tear ‘from its end in, and on
ing 42 for arm 22, so that on energizing of the motorgthe
mounting and chuck secured thereto are rotated under
expansion of the expansi'ble section, the roll is strong
3,097,808
3
power. The motor enables the stand to be used in wind
ing up paper on any empty core.
~
The free ends of the arms (and the opposed chucks
thereon) are moved toward and away from each other,
when grabbing and releasing a roll, respectively. They
aremoved. up in unison when picking up a roll, and down
in unisonwhen laying downa roll. ,
7
4
take up slack existing between the inside of the roll and
the chucks, as the chucks are advanced into holding posi
tion. This may occur, for instance, when the extreme end _
of a roll reaches approximately the point indicated at “X”
on a chuck (refer to FIG. 2). On continued movement
of a chuck, the core of a roll is compressed, and at the
same time the roll is shifted to a position squarely centered
on the chuck. The ?are of the centering portion is so
Reference is now made to FIGS. 2 and 3, where a single
chuck is shown in more detail. The two chucks are simi
slight, however, that ordinarily substantially no radial ex
lar, so ~‘only one of them willbe described.
10 pansion of the paper on the core takes place, such as
As can beseen with reference to theseaforementioned
might cause rupture. The ?ange 52 performs the im
?gures, achuck 40 comprises a body part 50, having at
portant function of limiting the inward movement of the
oneendanannular ?ange or end plate 52. In ?ange 52
are bores 53, accommodating the screws used in securing
a chuck toa mounting 42. Progressing toward the other
endof- the chuck from ?ange 52, body part 50 is provided
with a frusto-conical centering portion 54 (bounded cir
cumferentially by a surface 54a that ?ares in a direction
progressing axially toward ?ange 52), an annular surface
56 that lies perpendicularito the axis of the chuck, a cylin
drical surface portion 58, another annular surface 60, and
a cylindrical surface portion 62 of smaller diameter than
surface portion 58. A counter bore 64 extends axially in
wardly from the end of body part 50 opposite ?ange 52.
Mounted; on theend of body part 50‘ opposite ?ange 52,
and encirclingsurface portion 62,, with an edge 72 abutted
against annular surface 60, is a retainer 66. The retainer
is secured in place with screws 68. The outer surface 66a
of the retainer, at the end of the retainer adjacent edge 72,
has a‘diameter that is substantially the same as the diame
ter of the smaller end (the minor diameter) of centering
portion 54. At 70,)thesurface of the retainer starts to
taper inwardly, progressing toward the right end of the
chuck. Thus, the chuck is provided with a tapered por
tion at the end. of, the chuck, opposite ?ange 52 (its in
sertable end)’. The butt end of the tapered portion has a
diameter “(the major diameter of the tapered portion)
approximately equaling the minor diameter of the center
ing portion.
'
,
Seated in the annular space extending about the chuck
and bounded by surface 56, surface portion 58, and edge
72 of the retainer, is an annular envelope 74, of ?exible
material such as rubber or other synthetic. The envelope
is in?atable, .and upon in?ation expands.
Thus, the
chuck, thus limiting the extent to which the centering por
tion is wedged into the end of the roll.
After centering of the roll on a chuck, envelope 74 is
in?ated, and when in?ated, it expands against the insidev
of the roll core, along an area generally indicated in FIG.
2 at “Y.” On expansion of the envelope, a ?rm clamping
pressure results, su?icien‘t frictionally to hold the roll
securely in place. Since the area grabbed is inwardly
from the end of the roll, there is no tendency for the roll
or its core to start tearing progressing inwardly from its
extreme end. The outer diameter of the expanded enve
lope is somewhat greater than the outer diameter of the
envelope unin?ated, and somewhat less than the diameter
of the larger end of the centering portion.
To release a roll, of course, the process is reversed.
That is, air is exhausted from the envelope of each chuck,
which enables the envelope to contract.
If the arms
mounting the chucks are then spread apart, the centering
portions of the chucks move out freely.
.
The chuck described is ideally suited for shaftless wind
ing and rewinding stands of the type illustrated. The con
struction enables'?rm gripping of a roll without loss or
damage to the roll core or the paper thereon. Very im
portant, the roll is properly centered, so that even with
heavy rolls rotated at high speeds, gyrational tendencies
due vto imbalance are substantially eliminated.
Iclaim:
1. Means for ‘attaching to the inside and end of a
hollow roll core comprising an arm, an insertable chuck
for gripping the inside of the hollow roll core mounted
on said arm and projecting out to one side thereof, said
chuck comprising a rigid 'body including an end plate
envelope constitutes an expansible section in the chuck. 45 disposed with one side thereof facing said arm and a
The envelope is keyed in place through lug portions 76
integral with side walls of the envelope, that project into
accommodating bores 78 provided in retainer 66and body
part 50.
a
-
.
The envelope is in?ated through a valve stem 80 secured
to a ?tting 82, connected by a conduit section 84 with the
interior of envelope 74. The valve stem constitutes an
inlet forthe envelope,_and is accessible from the circum
ferential periphery of the chuck. This enables the
envelope to be in?ated or de?ated, with the chuck inserted
into the end of a roll.
> t
.
It should be noted that centering portion 54 constitutes
only a minor part of that portion of the chuck that is
inserted into the end of a roll core. The slope of surface
54a is quite slight, ordinarily not exceeding about 10°.
Also to be noted is that the outer surface of envelope 74
spans the distance between edge 72 of the retainer and
the smaller end of the centering portion, and that such
surface is smooth and has a diameter that equals approxi
mately the diameter of the smaller end of the centering 65
portion.
_
.,
'
Describing the operation of the stand, when the stand is
used in picking up _a paper roll, the opposed arms 20, 22
are brought together, with the tapered ends of the chucks
?tting easily into the ends of the roll. The ends initially
serve to guide the chuckslinto position. As the chucks
are advanced inwardly, the core of the roll slides over
frusto-conical centering portion joined to the other side
of said end plate with the larger diameter end of the
centering portion next to said end plate, said end plate
including a marginal portion that projects radially out
wardly from said centering portion, a substantially cy
lindrical expansible section axially aligned with said cen
tering portion having a diametersubstantially the same
as the diameter of the smaller diameter end of said cen
tering portion, said expansible section having stationary
ends mounted on said chuck body, said expansible section
having one of its said ends adjoining the smaller diam
eter end Ofw'Said centering portion, means for shifting
said ‘arm and the chuck thereon in a direction paralleling
the axis of said centering portion whereby the chuck may
be moved into a roll core with said end plate abutting
the end of the core, and means for circumferentially ex
panding said expansible section ‘between the stationary
ends thereof.
‘
2. ~Means for attaching to the inside and end of a
hollow roll core comprising an arm, an insertable chuck
for gripping the inside of the hollow roll core mounted
on saidarm and projecting out to one side thereof, said
chuck ‘comprising a rigid chuck body including an end
plate; disposed with one side of the plate facing said arm
and a frusto-conical centering portion joined to the other
side of said end plate with the larger diameter end of the
centering portion next to said end plate, said end plate
the outer surfaces of the envelopes in the chucks, and
thence engages the surfaces of the centering portions.
including a marginal portion projecting radially out
The-principal function of the centering portions is to 75 wardly from said centering portion, a substantially cylin
3,097,808
5
6
drical expansible section axially ‘aligned with said cen
tering portion having a diameter substantially the same
wardly from said centering portion, ‘a substantially cy
lindrical expansible section ‘aligned with said centering
as the diameter of the smaller diameter end of said center
portion having ‘a diameter substantially the same as the
diameter of the smaller diameter end of said centering
portion, said expansi‘ble section having one of its ends
mounted on said chuck body, said expansible section
adjoining the smaller diameter end ‘of said centering por
having one of its ends adjoining the smaller diameter
tion, means for producing circumferential expansion of
end ‘of said centering portion, means for shifting said arm
said expansible section, and ‘actuating means operatively
and the chuck thereon in a direction paralleling the axis
connected to said means for producing circumferential
of said centering portion whereby the ‘chuck may be
inserted into a roll core with said end plate abutting the 10 expansion of said expansible section, said actuating means
having an end disposed between the faces of said end
end of the roll core, means for producing circumferential
ing portion, said expansible section having stationary ends
expansion ‘of said expansiblc section, and actuating means
operatively connected to said means for producing cir
plate and exposed at the outer periphery of said marginal
portion.
cumferential expansion of said expansible section, said
actuating means having an end disposed between the faces 15
of said end plate and exposed at the outer periphery of
References Cited in the ?le of this patent
UNITED STATES PATENTS
said marginal portion.
3. Mechanism for supporting 'a hollow roll comprising
an ‘arm and means mounting the arm whereby an end
thereof may be moved toward the end of a. roll, a 20
mounting journa-led on said end of said arm, and an
insertable chuck secured to said mounting, said chuck
comprising a chuck body including an end plate with
one face thereof positioned against said mounting and a
2,134,475
2,285,966
2,499,562
2,583,117
2,621,867
2,733,022
Green ______________ __ Oct. 25,
Hamilton ____________ __ June 9,
Behrens ______________ __ Mar. 7,
Piperoux et \al. ________ __ Jan. 22,
Grettve ______________ __ Dec. 16,
Grody ______________ __ Jan. 31,
2,903,200
McDougall et al. ______ __ Sept. 8, 1959
Beninger et \al. ________ __ Mar. 7, ‘19611
frusto-conical centering portion joined to the other face 25 2,973,914
of said end plate with the larger diameter end of said
centering portion next to said end plate, said end plate
163,738
including a marginal portion projecting radially out
1938
1942
1950‘
1952
1952
1956
FOREIGN PATENTS
Australia ___________ .._ June 29, 1955
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