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Патент USA US2411349

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Nov. 19, 1946.
T. J. VAN ALSTYNE
BOTTLE
CAP
'
Filed April 5, 1944
Z41
W/
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2,411,349
2,411,349
Patented Nov. 19, 1946
UNITED STATES PATENT
OFFICE
2,411,349
BOTTLE CAP
Thomas J. Van Alstyne, Portland, Oreg.
Application April 5, 1944, Serial No. 529,601
.
1 Claim.
(Cl. 215—51)
1
2
This invention relates generally to closures for
milk bottles and particularly to a bottle cap.
The main object of this invention is to devise
In the practice of my invention, instead of em
ploying a metal staple, I prefer to strike a row of
a paper bottle cap of the type including a lifting
tab which will render unnecessary the use of the
partial perforations it along the hinge line I6,‘
and extending beyond the limits thereof. These
perforations are preferably short lines normal to
conventional wire staple ordinarily employed to
strengthen the cap at the lifting side of the tab.
the hinge line it, although they may assume
other shapes without departing from the spirit
of this invention.
The second object is to produce a cap of the
The functions of the‘perforations 15 are three
class described which will eliminate any possibil
ity of a rust formation, at the same time conserv 10 fold. First, it scores the tab l3 along the hinge
line it, insuring a straight bend, and naturally a
ing metal as well as lessening the cost of the cap
greater resulting strength, and secondly, it turns
itself.
the ?bres from the lamination II into the lam
I accomplish these and other objects in the
ination I2, thereby riveting or tacking the lam
manner set forth in the following speci?cation
as illustrated in the accompanying drawing, in 15 inations together along the hinge line l6, and
thirdly, it divides the breadth of the relatively
which:
weak hinge material into a plurality of narrow
Fig. 1 is a plan of the improved form of cap.
strips of greater density occasioned by the dis-,
Fig. 2 is an enlarged section taken along the
placement of the material in the slotsI at the
line 2-2 in Fig. 1.
‘
Fig. 3 is an enlarged view taken along the line 20 same time prevents a continuous tear.
While I have thus illustrated and described
3-3 in‘ Fig, 1.
my invention, it is not my intention to be limited
Fig. 4 is a still larger magni?cation of a frag
to the precise form of cap or partial perforation
mentary cross section taken along the line 4-4
illustrated herein, but it is my intention to cover
in Fig. 1, showing the tab raised.
Referring in'detail to the drawing, there is 25 all such forms and modi?cations of the device
as fall fairly within the appended claims.
shown a circular disc 1!] of a specially prepared
I claim:
paper board having de?nite laminations II and
A paper milk bottle cap consisting oftwo plies
i2 providing a distinct separating quality adapted
of paper forming a circular disc, one of said
to facilitate the raising of the flap l3 without un
due loss in tensile strength. The usual thumb 30 plies having a semi-circular perforation formed
therein and having a plurality of pointed per
notch Ill is also provided. Caps of this type are
forations extending along the diameter of ‘said
in common use and are usually reinforced by
semi-circular perforation to form a hinge line
means of a metal staple. Such staples are not
only difficult to obtain but require special equip
therefor, said pointed perforations extending into
ment for applying same, and often result in the 35 the second ply and serving to unite the plies
formation of rust due to the continued presence
along the hinge line thereof.
,
THOMAS J. VAN ALS'I'YNE.
of moisture.
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