Патент USA US2409789код для вставки
> Get. Å22, 1946. A. G.osBoRNE 2,409,788 I METHOD FOR APPLYING CLOSURES TO CONTAINERS Filed Oct. 21, 1942 2 Sheets-Sheet 2 m /1 7% ' V lNvENToR Andrew 6 Osborne , . BY / Patented Oct. 22,\_ 1946 2,4o9,1ss ' ~ i, UNITED s'rATES PATENT OFFICE, ME'rHoD Fort APPLYING cLosUnEs "ro coN'rAINEas Andrew G. OsbornejNew Kensington, Pa., as of America, signor to Aluminum Company' \ Pittsburgh, Pa., a corporation of Pennsylvania Application October 21, 1942; Serial No. 462,826 3 Claims. (Cl. 226,-87) 1 _ Thisinvention relates to a method for apply ing closures to >containers and more particularly to a method for reforming metal closure blanks and the sealing liners thereof to threaded con tainers, especially those of glass. , i ïn'closures for 'containern seals are made by , 2 Fig. 3 is a view similar to Fig. l of a modified form of closure; ' ~ Fig. 4 is a view of the closure of Fig. 3 after . application, the closure and a portion of the con tainer ?nish being shown in cross section; Fig. 5 is a vertical cross section of the sealing apparat-us showing a container neck and closure .pressing a sealing material against one or more in the sealing position; and v sealing surfaces on the container within the clo Fig. 6 is a view showing the pressure block and sure. compressible or plastically deformable seal ing materials such as cork or soft rubber are, of 10 a containerneck without a closure thereon in the course, desirable for this purpose but because these materials are not always readily available sealing position. - According to my invention a seal is formed be tween the closure liner and a plurality of sealing surfaces on a container by placing a plain skirted pressible sealing materials such as paper, pulp board cr the like sometimes becomes a practical 15 metallic closure blank having a suitable liner on the container and then reforming the edge of the necessity. These relatively incompressible ma liner and the section of the metal blank adjacent terials must be pressed with considerable force thereto around at least the top and side of the into intimate contact with the sealing surfaces of open end of the container ?nish by the applica the container and there held by an unyielding force to insure tight positive sealing. Further 20 tion of pressure to the top of the blank. When the seal has ?geen formed in this manner and more, with such materials, a greater area of con orare relatively expensive, the use of less com while the pressure is still being applied, the clo sure -blank is secured to the container by spinning threads in thejskirt to conform to the threads dis fcr easily compressible sealing materials. In machines belonging to the general class to 25 posed externally on the container finish. As em ployed throughout the speci?cation and append which the present apparatus relates, an occa ed claims, container ?nish refers to the portions sional breakage of the glass containers occurs of the container embraced by a closure, and during the sealing operation. This is principally “sealing surface” refers to that portion of the due to the contact of thread-forming elements with the bare glass of the containers to Which 30 container ?nish contacted by the liner. In practicing my invention, a cup-like blank tact between the liner and the sealing surfaces of the container is desirable-than that required no closure blanks have been applied. Although is provided com-prising a one-piece body having much has been done. to alleviate this by improv a closedend and a continuous unthreaded de ing the cap delivery mechanism, absolute relia pending skirt, the lower end of which is prefer bility in performance of the delivery mechanism 35 ably ?nished with an annular wire edge or like is generally unobtainable. It is, therefore, desir construction to give reinforcement thereto. In able to provide other means, preferably in asso the skirt adjacent the closed end of the blank, an ciation with the'sealing head, to minimize break annular channel or bulge, the diameter of which age of ccntainers in the aforementioned manner. is somewhat larger than the diameter of the skirt; . :It is an object of the present invention to pro vide _.a method of reforming metallic closure 40 is provided to receive and hold a liner and to fur nish su?icient metal for the formation of an an blanks on containers to produce a seal on a plu nular reinforcing rib during the sealing opera rality of container sealing surfaces. It is another tion. The liner which may be either adisc or 'a object of the invention to provide a method of ring is ?tted snugly into the channel and is some producing a tight positive seal between the seal 45 what larger than the top of the container defin ing surfaces of containers and closure liners of ing the opening. The annular channel and the paper, pulp board, news board and other similar oversized liner ?tted therein are essential in the materials Which are relatively inco-mpressible as present method to the formation and to the re compared With soft rubber, cork, etc. Further tention of a seal on the side sealing surfaces of objects and advantages Will be apparent from the the container finish, particularly with the afore following description. mentioned relatively incompressible sealing ma 4In the accompanying drawings: terials. During the sealing operation the liner in T i Fig. l is a vertical cross sectional view of a closure blank and pressure block, the container on which the blank is to be reformed and a the closure blank is reformed by drawing the edge of the liner downwardly around the outside of - the container mouth. The incompressible mate Fig.'2 is' a view similar to Fig. 1 showing the rials, being relatively stift, tend to pull away from the side of the container. To prevent any sub closure after application with the pressure block' and thread-forming roller still in contact with stantial retraction of the liner from the side of the container, an annular rib is formed in the thread-forming roller being shown in elevation; the closure; 60 closure near the lower edge of the liner during azioavss 3 4 the reforming operation, to give lateral support cally on the generally frustum shape cam sur to the metal vof the closure retaining the liner in face Zl, causing rollers 9 to engage the skirt of the reformed position. As a result of this opera the blank and to spin threads thereon corre tion, the skirt is extended further down the con sponding to the threads on the container ?nish. tainer, preferably until the Wire edge of the skirtv v cl If during the operation a container is presented is forced against a continuous bead on the con v to the sealing head without a closure blank, the tainer. When the closure is in this position, same sequence of operation above described is performed, but With the improved pressure threads are spun in the skirt to correspond to the block of the present invention the container slips threads disposed on the container ?nish. Referring now to the dra'wings, particularly 10 within the pressure block, as shown in Fig. 6. In Fig. 1, a blank having a dome-shaped end I, de this instance, rollers 29 do not proceed upwardly pending skirt 2, wire edge 3, annular channel 4, on cam surface 2l as far as when a container on Which a blank has been placed is presented, and and liner disc 5 inserted therein, is shown on container 6 preparatory to the sealing operation consequently rollers 9 do not contact the con tainer. with pressure block 'i and knock-out plunger 8 Throughout the speci?cation the description Contacting the end I and channel 4 and with thread-forming roller 5 in its non-Operating posi of my invention has been principally directed to tion. In the sealing operation, pressure block 'I the formation of tight seals With closures hav and container 6 are moved relative to one an ing liners of pulp board and like materials. other, creating a pressure on' the blank at chan 20 Reference to these materials, however, has been nel 4 whereby the edge of liner 5 and the metal only for the purpose of illustration and is in no comprising'channel 4 are drawn downwardly over way intended as a lim'itation on my invention, other more compressible and elastic materials, the side of the container t'o form a top and side seal lo and! i, respectively, and annular rib [2, such as cork and rubber, being entirely suitable as 'shown in Fig. 2. It will be appreciated that 25 in vpracticing my invention. the ?nal shape of rib 52 is determined by the con . I claim: tour 93 of pressure block I. During the relative 1. A method of sealing containers having an movement of the pressure block and the con externally threaded ?nish and a side sealing sur tainer, a plurality of forming rollers 9, only one face with a plain skirted metallic closure blank of which is shown in the ?g'ures above referred 30 having an annular bulge formed between said to, revolve bodily around the closure blank and skirt and the closed end of said blank and having advance toward skirt 2. When relative move an Oversize liner disposed therein, comprising ment of pressure block 1 and the container pressing the overhanging margin of said liner toward one another is nearly completed, the into engagement with said side sealing surface rollers contact the skirt and, as they revolve by bending a portion of said blank in contact around the skirt, form threaded indentations |4 with said margin downward past the container therein, conforming to threads IB of the con mouth, and siniultaneously therewith reforming tainer ?nish. The closure as applied by the fore said bulge into an annular rib adjacent the going operation is shown in Fig 2 wherein pres margin of said liner, and thereafter spinning sure block 'E and thread-forming rollers 9 have 40 threads in said skirt to conform to the threads not been retracted following the operation. disposed on said container ?nish. In Fig. 3 a closure blank is shown in position on 2. A method of sealing containers having an a container preparatory to the sealing operation. externally threaded ?nish and a side sealing I-Iere, while the sealing operation performed is surface with a plain skirted metallic closure blank substantially the same as that embraced in Figs. 45 having an annular bulge formed between said 1 and 2, a blank is provided with a panel shown skirt and the closed end of said blank and having at lt. rIlhe principal advantages of this modi?ca a flat oversize liner of non-resilent material dis tion over the one shown in Figs 1 and 2 lie in posed therein, comprising' pressing the over the somewhat greater sealing surface contacted hanging margin vof said liner into engagement by the liner, and in the pressure created between 50 with said side sealing surface by bending a por the liner and the corner of the mouth of the tion of said blank in contact with said margin container at ~ l'I as best shown in Fig. 4. downward past the container mouth, and simul taneously reforming said bulge into an annular My sealing apparatus consists of hollow pres rib adjacent the margin of said liner by the ap sure block 'i and knock-out plunger 8 mounted therein and yieldably supported by shaft l8. 55 plication of pressure to the top of said annular bulge, and thereafter spinning threads in said Pressure block 1, the internal diameter of which skirt to conform to the threads disposed on said at the forming end is somewhat larger than the container finish. outside diameter of the container ?nish, is 3. In a method of sealing containers having a. machined to provide surface l3 for con tacting and reforming a closure blank. 60 side sealing surface with a skirted metallic closure blank having an annular bulge formed Plunger 8 is urged downwardly by spring |9 to between said skirt and the closed end of said provide sufficient pressure to hold a closure blank on a container as it enters the sealing mechanism blank, and having. an oversize liner disposed and to eject a closure after it has been applied therein, the steps comprising pressing the over to a container. 65 hanging margin of said liner into engagement In Fig. 5, my sealing apparatus is shown with said side sealing surface by bending a por mounted in the general type of sealing mechan tion of said blank in contact with said margin ism disclosed by United States Patent 1,674,266 downward past the container mouth, and simul to J. E. Sharp. In the operation of this taneously therewith reforming said bulge into an mechanism,_when a container is presented to 70 annular rib adjacent to the margin of said liner. the sealing position, pressure block 'I engages the top of the blank and cam rollers 2D travel verti ANDRE'W G. OSBORNE.