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    • 62. 发明授权
    • Apparatus for forming plastic articles from sheet materials
    • 用于形成材料的塑料制品的装置
    • US3854860A
    • 1974-12-17
    • US34914273
    • 1973-04-09
    • KENT PLASTICS CORP
    • HAAG J
    • B29C51/00B29C51/04B29C69/00B29C17/04B29C27/00
    • B29C51/267B29C51/00B29C51/04
    • An apparatus and method for thermoforming plastic articles from plastic sheet material, the sheet material being heated and positioned between forming members each of which includes a die face and at least one of which includes one or more plug assists. The forming members are first in a position relative to one another so that each plug assist is aligned with a die face with the sheet material therebetween so that when moved toward one another, the plug assist displaces the sheet material toward the die face. A pressure differential is utilized to urge the sheets into contact with the die faces and maintains this contact while the forming members are then shifted relative to one another so that the die faces are aligned. The die faces are then brought into abutting relationship and the sheets are sealed at the edges of the die face to thus finish forming the resulting hollow article.
    • 一种用于从塑料片材料热成型塑料制品的装置和方法,片材被加热并定位在每个包括模具面的成形构件之间,并且其中至少一个包括一个或多个插头辅助。 成形构件首先处于相对于彼此的位置,使得每个插头辅助件与其间的片材材料的模具面对齐,使得当彼此移动时,插头辅助将片材朝向模具面移位。 使用压力差来推动片材与模具表面接触并保持该接触,同时成形构件然后相对于彼此移动,使得模具面对齐。 然后将模具表面形成邻接关系,并且将片材密封在模具面的边缘处,从而完成形成所形成的中空制品。
    • 65. 发明授权
    • Mechanism for forming shrink film packages
    • 形成收缩膜包装机构
    • US3629990A
    • 1971-12-28
    • US3629990D
    • 1970-04-24
    • MEAD CORP
    • CALVERT RODNEY KVIESCAS ARTHUR BFISHBACK ALTON J
    • B29C49/38B29C61/02B29C69/00B65B9/04B65B47/10
    • B29C51/267B29C49/38B29C61/02B65B9/04B65B47/10
    • Two series of endless chains each comprising a plurality of traylike open half shells pivotally interconnected at their ends are arranged in close proximity to each other so that the working reaches of the chains are parallel and so that the open shells of one chain are disposed in opposed relation to the open shells of the other chain to form a series of cavities along the working reaches of the chains. A strip of heat-sealable shrink film is disposed along and held against the open faces of the half-shells of each of the chains and vacuum means is employed to draw the film into lining relation with each of the half-shells. An assembly of items to be packaged in inserted into the space between two opposed half-shells adjacent the entry end of the working reaches of both chains. After the half-shells of one reach come into biased engagement with the open half-shells of the other reach to envelope an assembly of items to be packaged, a jet of heated air is applied along the top and bottom edges of the shells to form top and bottom seals between the strips thereby to form a series of interconnected packages. After the packages are formed by heat sealing, the mating shells are moved in opposite directions away from each other and heated air is subsequently applied to each package so as to shrink the film somewhat thereby to preserve the integrity of the package. Preferably the film is of the nonoriented-type and is preheated before being drawn into the half-shells. After a plurality of packages are formed in interconnected following relationship by the mechanism and method of this invention, the packages are severed one from another by any suitable means. One arrangement for severing interconnected packages is disclosed and claimed in U.S. Pat. application Ser. No. 17,459 filed Mar. 9, 1970. While the package itself may take several specific forms, a typical package is disclosed and claimed in U.S. Pat. application Ser. No. 49,270 filed Nov. 3, 1970 wherein a package having open ends is disclosed.
    • 66. 发明授权
    • Apparatus for vacuum forming hollow plastic articles
    • 真空成型中空塑料制品的设备
    • US3597799A
    • 1971-08-10
    • US3597799D
    • 1969-02-24
    • MATHER CO
    • EARLE HERBERT J
    • B29C51/18B29C69/00B29C17/00
    • B29C51/267B29C51/18
    • An apparatus for forming at least one planar sheet of heatfusible plastic into a hollow article by heating the plastic sheet to its fusion temperature; folding the heated sheet so as to bring preselected portions of the sheet together and holding other portions thereof spaced apart; and fusing the contacting portions together. An open frame supports and holds opposite edges of the heat-fusible plastic sheet during the heating of both planar surfaces of the sheet and the moving of the sheet parallel to a two section hinged planar mold. The edges of the sheet also may be preheated before its planar surfaces are heated. A vacuum is applied to draw the heated sheet into the mold cavities and concurrently the heated sheet is released form its supporting frame. The mold is then folded to fold the plastic sheet between the folded sections of the mold, which sections are then clamped in their folded positions. If desired, a sheet of insulation, such as of plastic foam, may be inserted between the folded portions of the sheet before the mold sections are folded together. Next these clamped sections are pressed to fuse together preselected portions of the folded sheet. These preselected portions may have been further heated before fusion and a cooling medium may be circulated through the mold sections to set the formed article. Compressed air then may be applied to one of the mold sections to release the article from that one section as the mold is opened. Lastly, air and/or a pusher is employed to eject the article from the other mold section.
    • 69. 发明授权
    • Apparatus for forming hollow plastic articles
    • 用于形成中空塑料制品的装置
    • US3411974A
    • 1968-11-19
    • US49248765
    • 1965-10-04
    • DUNLOP CO LTD
    • JAMES JONES-HINTONGRAY THOMAS E H
    • B29C51/10B29C65/00B29C65/04B29C69/00
    • B29C51/267B29C51/10B29C65/04B29C65/7847B29C66/1312B29C66/3282B29C66/54B29C66/71B29C66/8242B29C66/8322B29L2031/54B29K2001/18B29K2023/065B29K2023/12B29K2023/16B29K2027/06B29K2055/02B29K2069/00B29K2077/00
    • 1,131,322. Table tennis balls. DUNLOP CO. Ltd. 6 Oct., 1965 [14 Oct., 1964], No. 41827/64. Heading A6D. [Also in Division B5] Apparatus 39 for welding two shaped sheets 10, 38 of thermoplastic material together to form a table-tennis ball comprises a pair of electrodes each comprising an open-end cylinder 42 having an internal diameter at the open end substantially equal to the external diameter of a table-tennis ball and the cylinders 42 being arranged so that the open ends thereof are directly opposed, means to connect the electrodes to a source 46 of high frequency alternating electric current, and means to reduce the separation of the electrodes 42 during passage of the current therebetween. The sheets 10, 38 may be previously shaped by the method described in Specification 1,131,361. The apparatus 39 comprises a number of rod-like cylinders 42 on parts 40, 41 and which are shaped to conform to hemispherical projections 43 on the sheets 10, 38. The cylinders 42 are mounted to form electrodes on base plates 44, 45 which are connectable to the source 46. The periphery of each cylinder 42 is chamfered so as to produce a line of high concentration of the alternating current and the end surfaces 48, 49, Figs. 7 and 8 (both not shown), of an opposed pair of cylinders 42 are shaped to form a V-section gap 50 the angle of which is from ¢‹-7‹, preferably 3‹. The upper part 40 is mounted on a bar 51 slidable in a cylinder 52 and when the source 46 is connected, the bar 51 is moved, as the sheets 10, 38 are softened, to bring the part 40 closer to the part 41 so that only a very fine gap remains between opposed cylinders 42. This movement forces some of the thermoplastic material into the interior of the ball to form a reinforcing bead 5. Fig. 8 (not shown). After welding, the balls are removed from the surrounding excess sheet material. In modification (not shown), the electrodes may be hollow cylindrical projections with or without a shaped core of insulating material. The apparatus may be maintained at a controlled elevated temperature to raise the temperature of the thermoplastic material prior to passage of the high frequency current but not sufficiently to cause the material to be deformable. Specified thermoplastic materials are polyvinyl chloride, terpolymers of acrylonitrile with butadiene and styrene, copolymers of diphenylolpropane and epichlorhydrin, polyamides, e.g. nylon, and polycarbonates.