Patent Publication Number: US-3874542-A

Title: Crowned cover

Description:
United States Patent [191 Kowalczyk Apr. 1, 1975 CROWNED COVER 2,353,879 7/1944 Clark 215/325 Inventor: yg Kowalczyk, ()polska 3,198,369 8/19,}65 Jacques 215/328 59/201 Golemow Poland Primary Examiner-Donald F. Norton [22] Filed: Nov. 28, 1973 Attorney, Agent, or Firm-Eric H. Waters [21] Appl. No.: 419,722  
  52 us. Cl. 215/328 [57] ABSTRACT 51 int. Cl. B65c 41/12 A crowned bottle p has a seal and a crowned flange 5 Fi l of Search 215 324 327 32g 32 having individual segments inclined at different angles measured along the radius of the circle described by [56] References Ci d the flange with the inner edges of the segments in- Circumferential) 1,861,603 6/ 1932 Lindsay 215/328 4 Claims, 4 Drawing Figures CROWNED COVER BACKGROUND OF THE INVENTION The invention relates to a crowned cover which has a seal usually made of plastic, and which is designed for hermetically closing glass bottles on a one-time basis.  
  The crowned cover, before it is placed on the head of the bottle, has a nominal height usually varying within the limits of 5.6 mm 6.9 mm, and a crowned flange which is inclined at an equal angle and has a nominal diameter of substantially 32 mm.  
  The main function of the crowned cover consists of tightly closing the bottle in which above-atmospheric pressure of the gas varies within very wide limits. Then, the cover should permit easy removal from the bottle by the consumer.  
  An important part in fulfilling these functions are the following elements: the cap of the cover, and the crown flange of the cover, especially the angle of inclination of the segments of the flange.  
  The constant value of the preceding angle, within the limits of gives poor results, particularly from the viewpoint of tightness and consumption of materials. Beyond this, the convexity of the cap generally used, gives also rise to excessive consumption of materials.  
  Accordingly, it is an object of the present invention to avoid the disadvantages of conventional covers by providing a predetermined shape of the crown flange, especially of its segments in relation to the front plane of the cover, and by shaping the cap of the cover in predetermined manner.  
 SUMMARY OF THE INVENTION The crown cover according to the invention has a crown flange and a cap differently shaped. The individual segments of the flange are inclined at different angles measured along the radius and/or additionally inclined at an angle measured along the circumference of the flange. Beyond this, the segments of the flange are inclined at an angle which is greater than that used conventionally. The above features are achieved by extrusions made in the cap and directed towards the interior of the cover. In practice, the application of the invention improves the tightness of the closure through better conformance of the cover to the head of the bottle, and allows savings in materials.  
 BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a sectional view of a crowned cover with a flange having individual segments inclined at different angles;  
  FIG. 2 is a sectional view of a crowned cover with segments inclined further than in FIG. 1;  
  FIG. 3 is a sectional view of a crowned cover with a flange having segments all equally inclined;  
  FIG. 4 is a sectional view of a cover having extrusions directed towards the interior.  
 DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawing, the crown cover according to the invention has, in the crown flange, individual segments inclined at a different angle a(alpha) measured along the radius of the circle described on this flange. Furthermore, a part of the segments or all of the segments are inclined at an angle a which is greater than 15.  
  Another embodiment according to the invention, is a crown cover with segments which are additionally inclined at an angle B (beta) measured along the circumference of the circle described, for example, on the inner diameter of the flange.  
  The technological simplest solution, according to the invention, is a crown cover with a flange, all segments of which are inclined at the same angle B, measured along the radius of the circle described on the flange. This angle is greater than 15.  
  The above embodiment of the invention is attained by the extrusions z in the cap, which are directed towards the interior of the cover.  
  The difference in the angle of inclination of the individual segments of the crown flange and their additional inclinations along the circumference of the circle results in a closing process which matches or conforms the crown cover well to the head of the bottle. The production tolerances, involved, furthermore, are relatively high. This results in providing very good and tight closure, and in material saving.  
 The increase of the angle of inclination of the segments of the flange considerably above 15, apart from improving the tightness of the closure, makes it possible to apply thinner seals and a somewhat smaller diameter, whereby material consumption is reduced.  
  The use of extrusions t in the cap which are directed to the interior of the cover, makes it possible to gain further reduction in consumption of materials, especially in case of seals formed by rotation.  
  In the drawing, FIG. 1 is a cross section of a crowned cover with a flange in which the individual segments are inclined at a different angle a and a. FIG. 2 shows half cross sections a and b of crown covers, in which individual segments are additionally inclined at an angle B, measured along the circumference of the circle described on the inner diameter. FIG. 3 is a cross section of a cover with a flange, all segments of which, are inclined at an equal angle a greater than 15. FIG. 4 are half cross sections a and b of covers, the caps of which are provided with extrusions directed towards the interior.  
  Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention, and therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.  
 I claim:  
  1. Crown cover for hermetically closing bottles on a one-time basis, comprising a seal, a crowned flange with individual segments inclined at different angles measured along the radius of the circle described on said flange.  
  2. Crown cover according to claim 1, wherein said segments are further inclined at an angle measured along the circumference of the circle described on the inner edges of said segments.  
  3. Crown cover according to claim 1, wherein said segments in said flange are inclined at an angle greater than 15.  
  4. Crown cover according to claim I, wherein said cap is provided with extrusions directed towards the interior of the cover.