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Патент USA US2136962

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NOV. 15,v 1938,
I
c, R BELK' SIR
2,136,962
TUBE CONTAINER FOR MILK BOTTLE GAPS
F'iled Feb. 5,. 1937
Charles 7.2?- 551121, 51:
Patented Nov. 15, 1938
2,136,962
UNITED STATES PATENT OFFICE
2,136,962
..
TUBE CONTAINER FOR MILK BOTTLE CAPS
Charles R. Belk, Sn, Bessemer, Ala.
Application February 5, 1937, Serial No. 124,329
1 Claim. (Cl. 206-46)
This invention relates to cardboard tubes de
formed, in the usual manner, is then pressed by
signed for use in machines for applying card
any suitable means to form the recess 4 extend
board caps to milk bottles.
.
Where the caps to be fed in a capping ma
5 chine are circular disks, an ordinary cylindrical
tube, of a diameter to ?t in the capping machine,
may be used. The tube forming the subject mat
ter of this application is intended to package
caps of the circular disk type each having a tab
10 or lug extending radially from its periphery to
facilitate removal of the caps from milk bottles.
Caps of this type require a tube having a cylin
drical body of a diameter slightly greater than
the diameter of the circular part of the cap, pro
15 vided with a recess extending lengthwise of the
body and parallel to the axis thereof to receive
the projecting lugs and hold the caps in proper
position for automatic feed on to the bottles
handled by the capping machine.
20
Since these tubes are commonly made of card
board, the provision of the lug receiving recess
weakens the tube transversely, and permits dis
tortion thereof. Distorted tubes will not ?t the
capping machines properly; and consequently will
~25 not permit proper automatic feeding of the cap
to the bottles.
The main object of the invention, therefore, is
to provide a cardboard tube for circular disk
30
caps provided with projecting lugs, constructed
to retain their shape throughout their shipment
in package form and their use in a capping ma
chine.
Other objects of the invention will become
apparent as the detailed description thereof pro
ceeds.
ing throughout the length of the tube to receive
and form a guide for the lugs 5 on each of the disk
caps 6 of the type shown in Fig. 3.
While the tube is held in the recess forming
machine (not shown), a reinforcing strip 1 of
paper, or other suitable material, is pasted over
the outer surfaces of the recess 4, and for some
distance along the outer cylindrical surface of the 10
sheet I. These different layers of sheet material
form veneer plies which materially strengthen
the tube and aid in the retention of its shape.
In order to brace the projecting ridge 8 formed
by the recess 4, a sheet of paper is pasted to the 15
apex surface thereof, and is extended on oppo
site sides of the ridge to be pasted or otherwise
secured to the cylindrical outer surface of the
sheet I. The sheet 9 preferably covers about one
half of the cylindrical surface of the tube, and is
stretched during the securing operation to form
the braces l0 and II.
The veneer construction just described enables
the tubes to be formed very cheaply of compara
tively thin sheets of cardboard or similar ma
terial.
the length of the tube, forms with the ridge 9 a
truss which effectively prevents distortion of the
tube, and ensures its proper location on the ?lling
and capping machines.
30
What I claim is:
A self-sustaining tube, the major portion of
which is cylindrical, the minor portion being in
the form of a longitudinally extending crimp
In the drawing:
providing a groove on the interior of the tube
and a ridge on the exterior thereof, a strip of
Fig. 1 is a fragmentary elevation of a tube
reinforcing material secured to and extending
constructed in accordance with the present in
around the said ridge and from the corners
vention, parts being broken away to illustrate
details of construction;
formed by said ridge along the outer surface ad
jacent said corners, ‘and a second strip of rein
Fig. 2 is a section taken on the line 2-2 of
forcing material secured to the apex of the re
Fig. l; and
Fig. 3 is a perspective view of a disk or cap
inforced ridge and extending from opposite sides
of the ridge tangentially to the cylindrical outer
of the type which the tube shown in Fig. l is
surface of the tube to form therewith a truss
45 designed to package and hold in proper feeding
construction to prevent distortion of the tube,
said second strip being extended substantially
position in a capping machine.
As shown in the drawing, the tube comprises a
sheet I of cardboard, or the like, spirally wound
around and suitably secured to a similar sheet 2
50 to form a tube 3. The cylindrical tube thus
25
The outer layer, extending throughout
beyond the lines of contact with said outer sur
faces nearest to said ridge and having the parts
so extended secured to said outer surface.
CHARLES R. BELK, SR.
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