End plug for rolled materials

Abstract

A new concept of end plugs which are circular, concentric and symmetrical containing flanges at particular angles in front and back to produce a mechanical strength, is disclosed.

Having thus described my invention, I claim: 
     
       1. An improved end plug for a rolled goods packaging container which comprises a .[.circular cylinder known as a.]. .Iadd.cylindrical .Iaddend.sleeve having an external surface upon which the rolled goods are placed and an internal surface, .[.which is.]. .Iadd.said sleeve being .Iaddend.concentric to and around a symmetrical axis with a continuous back flange, said back flange being nearly perpendicular to the sleeve.[.;.]. .Iadd., .Iaddend.the outer diameter of said back flange .[.is.]. .Iadd.being .Iaddend.greater than the sleeve, and a second flange attached continuously to the sleeve .[.at.]. .Iadd.and recessed therein inwardly a distance from .Iaddend.the front of said sleeve, said second flange being concentric to and symmetrical with said sleeve and at least 20% of the area of said second flange being perpendicular to said sleeve, .Iadd.a first portion of the external surface of .Iaddend.said sleeve being at an angle of 90° to the back flange for a distance .Iadd.extending from said back flange of said sleeve .Iaddend.of up to one-half of the sleeve length and .[.then.]. .Iadd.the remainder portion of said sleeve external surface .Iaddend.tapers .[.at an angle of up to 10% off the vertical.]. .Iadd.with a taper of up to 10° inwardly toward said symmetrical axis .Iaddend.and the internal surface .Iadd.of said sleeve .Iaddend.tapers .[.at an angle of up to 10° off the vertical with respect to the back flange in the direction of the symmetrical axis.]. .Iadd.with a taper of up to 10° inwardly toward said symmetrical axis and from said back flange in the direction of said second flange.Iaddend.. .[.2. An end plug according to claim 1, wherein 
     
     
        the second flange is recessed within the sleeve..]. 3. An end plug for a rolled goods packaging container which comprises a .[.circular cylinder known as a.]. .Iadd.cylindrical .Iaddend.sleeve having an external surface upon which the rolled goods are placed and an internal surface, .[.which is.]. .Iadd.said sleeve being .Iaddend.concentric to and around a symmetrical axis with a continuous back flange, said back flange being nearly perpendicular to the sleeve.[.;.]. .Iadd., .Iaddend.the outer diameter of said back flange .[.is.]. .Iadd.being .Iaddend.greater than the sleeve, and a second flange attached continuously to the sleeve .[.at.]. .Iadd.and recessed therein inwardly a distance from .Iaddend.the front of said sleeve, said second flange being concentric to and symmetrical with said sleeve and at least 20% of the area of the said second flange being perpendicular to said sleeve, and in addition an inner sleeve parallel to said .Iadd.first .Iaddend.sleeve and perpendicular to said second flange .Iadd.and .Iaddend.attached continually to said second flange at the point of intersection .[.to.]. .Iadd.of .Iaddend.said second 
     
     
        flange and inner sleeve. 4. An end plug in accordance with claim 1 wherein the entire area of said second flange is perpendicular to said sleeve. .[.5. An end plug according to claim 3, where the said second flange is recessed within the sleeve..]. .[.6. An end plug in accordance with claim 4 wherein said sleeve tapers at an angle of up to 10° off the vertical parallel to the internal surface of the sleeve for its entire length and said taper is at an angle of up to 10° off the vertical with respect to the back flange in the direction of the symmetrical axis, containing in addition an inner sleeve parallel to said sleeve and perpendicular to the said second flange attached continually to said second flange at the point of intersection of said second flange and inner 
     
     
        sleeve..]. 7. An end plug according to claim 1, wherein the intersection of surfaces comprising the sleeve and back flange meet in a concave radius and the intersection of the surfaces of the sleeve and .Iadd.the 
     
     
        .Iaddend.second flange meet in a convex radius. 8. An end plug according to claim 3, wherein the intersection of surfaces comprising the sleeve and back flange meets in a concave radius and the intersection of the surface of the sleeve .[.in.].  .Iadd.and .Iaddend.the second flange meet in a convex radius. .[.9. An end plug in accordance with claim 1 wherein said sleeve for a portion of its entire length tapers at an angle up to 10° off the vertical with respect to the back flange and is concentric around the central axis of said plug and, in addition, said second flange is recessed within the sleeve..]. .[.10. An end plug in accordance with claim 9 wherein, the entire area of the second flange is 
     
     
        perpendicular to said sleeve..]. 11. An end plug in accordance with claim 1 wherein, in addition there is an inner sleeve parallel to said .Iadd.first .Iaddend.sleeve and perpendicular to said second flange attached continually to said second flange at the point of intersection of said second flange and the said inner sleeve. .[.12. An end plug in accordance with claim 10 wherein in addition there is an inner sleeve parallel to said sleeve and perpendicular to said second flange attached continually to said second flange at the point of intersection of said second flange and inner sleeve..]. .[.13. An end plug according to claim 1 wherein the second flange is recessed within the sleeve and said second 
     
     
        flange for its entire area is perpendicular to said sleeve..]. .[.14.  An end plug according to claim 1 wherein the second flange is recessed within the sleeve, wherein the entire area of said second flange is perpendicular to said sleeve, and an inner sleeve parallel to said sleeve and perpendicular to said second flange, attached continually to said second flange at the point of intersection of said second flange and said inner sleeve..].