Патент USA US2411349код для вставки
Nov. 19, 1946. T. J. VAN ALSTYNE BOTTLE CAP ' Filed April 5, 1944 Z41 W/ //////////// W 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.