Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 7063222 | Plastic container In a plastic container manufactured by melting blow molding a heated and molten parison extruded from an extruder, a mouth 3 and/or a specified part of a body 2 has a thicker thickness than the body proper. One or more thick parts of the body 2 ... | 06/20/2006 |
| 6716385 | Ethylene (co) polymers, and laminate and hollow molding made by using the same Ethylene (co)polymers each having specified values of (a) density, (b) molecular weight distribution (Mw/Mn), (c) relationship between die swell (DS) and shear rate (γ) in a region of shear rate ({dot over (γ)}), (d) relationship between stress (σ) and maximum st... | 04/06/2004 |
| 6706223 | Microcelluar extrusion/blow molding process and article made thereby A microcellular injection blow molding system and method, and microcellular blow molded articles produced thereby, are described. The system is equipped to extrude microcellular material that changes in thickness, material density, or both in the machine direction w... | 03/16/2004 |
| 6464907 | Method for producing a blow molded plastic outdoor boot shell A boot comprising an upper portion, an outersole portion, an optional midsole/wedge portion and a shell portion, wherein the shell portion is produced by the blow molding process. The shell portion may contain a midsole/wedge element inside or outside of ... | 10/15/2002 |
| 6319454 | Method and apparatus for manufacturing a hollow plastic product A method and apparatus for manufacturing a hollow plastic product is provided. In accordance with one aspect, into a mold half having a tubular groove portion and a projecting groove portion which projects outwardly from the tubular groove section is supp... | 11/20/2001 |
| 6284169 | Method of extrusion blow molding of a hollow body The extrusion blow molding of hollow bodies is carried out with a wall thickness program which in addition to varying the gap width over the entire perimeter of the gap in accordance with a first program curve and varying the geometry of the gap in respon... | 09/04/2001 |
| 6258301 | Method of blow molding hollow articles from thermoplastic synthetic resin A process for blow-molding hollow bodies from thermoplastic synthetic resin wherein, in addition to control to accurately position an extruder thermoplastic melt preform in the blow mold and to maintain a constant weight of the extruded preform, on the pr... | 07/10/2001 |
| 6221305 | Compression molded neck body with smooth inner wall The neck finish for a wide range of plastic water dispenser bottles is formed so that it has a smooth, straight inner diameter and is fully calibrated, not requiring any post trimming. The parison is extruded over a fixed blow pin, which also serves as an... | 04/24/2001 |
| 6024557 | Extrusion head for blow-molding apparatus An extrusion head for a blow-molding apparatus has an annular and relatively rigid outer housing centered on a housing axis, a rigid ring axially fixed in the housing and shiftable radially of the housing axis in the housing, and a sleeve generally coaxia... | 02/15/2000 |
| 5928581 | Synchronization of parison profile in a plastic container molding system In a blow-molding system in which a parison programmer is coupled to orifice tooling in an extrusion die head for controlling wall thickness of an extruded parison fed to a blow-molding apparatus, a method of synchronizing operation of the parison program... | 07/27/1999 |
| 5866061 | Method of manufacturing containers for dispensing solutions Method of manufacturing containers for dispensing solutions, includes the steps of: (a) extruding a parison from a die while injecting supporting air into the parison, and sealing a forward part of the extruded parison; (b) forming a middle portion of the... | 02/02/1999 |
| 5851570 | Electric drive for blow molding head An electric drive for controlling the die gap in a continuous blow molding head and the die gap and pushout in an accumulator blow molding head. The electric drive includes a programming screw for attachment to a programming rod for setting the die gap, a... | 12/22/1998 |
| 5840223 | Method of blow molding hollow articles from thermoplastic synthetic resin A process for blow-molding hollow bodies from thermoplastic synthetic resin wherein, in addition to control to accurately position an extruder thermoplastic melt preform in the blow mold and to maintain a constant weight of the extruded preform, on the pr... | 11/24/1998 |
| 5804128 | Cylindrical filter and process for producing the same A cylindrical filter formed of stacked microfine, conjugate fibers consisting of a higher melting point component and a lower melting point component, the fiber diameter of the conjugate fibers being varied into a smaller one in the thickness direction of... | 09/08/1998 |
| 5785920 | Extrusion molding apparatus and method of forming a parison A rod 3 is driven forward to open an annular slit 5 between a die 2 and a mandrel 4 and the molten resin in a resin accumulation chamber 10 is expelled from annular slit 5 to form a parison. In this operation, the die 2 is displaced from an original posit... | 07/28/1998 |
| 5718852 | Process controlling a blow molding machine The method for controlling a blowmolding machine during a process of making an object is disclosed. The machine includes a die head, a mandrel and an extruder that rotates and drives a plastic material between the mandrel and the die head to form a plural... | 02/17/1998 |
| 5674440 | Die head with adjustable mandrel and method A die head for extruding an annular body includes a mandrel having a warp portion with a number of segments spaced around the circumference of the mandrel. Heat is selectively flowed to the segments to warp the mandrel and vary the position of a die pin o... | 10/07/1997 |
| 5620722 | Extrusion head for blow molding An extrusion head for extruding a polymer into a parison for blow molding and including a die ring and a mandrel. The die ring and mandrel each include a frustoconical portion. One frustoconical portion is shaped over its full length to define an ovalized... | 04/15/1997 |
| 5486333 | Blow molding extrusion die with rectangular slots A die for a blow molding machine has at least one circumferential rectangular cutout section contiguous with the die exit in at least the die ring or the mandrel. The rectangular cutout section expands the material flow channel between the die ring and th... | 01/23/1996 |
| 5409647 | Process for the production of hollow bodies from thermoplastic material In that process for the production of hollow bodies from thermoplastic material by extrusion blow molding in which discontinuously extruded preforms are expanded in a blow molding mold, at least during that part of the filling phase which is typical of su... | 04/25/1995 |
| 5399302 | Parison length control method for blow molding machine A parison length control method for a blow molding machine in which a parison is extruded vertically, the end of the parison is closed, and a blowing gas is blown into the closed parison. The method includes the step of deriving a relationship between par... | 03/21/1995 |
| 5346665 | Method of blow molding and blow molding system When a resin article having at least one thickened part is blow-molded, a parison is extruded and suspended between halves of a blow mold the inner surface of which defines the outer shape of the article to be molded. An expander panel is inserted into th... | 09/13/1994 |
| 5256346 | Method of extrusion blow-molding hollow thermoplastic bodies Tubular bodies are extruded from thermoplastic material by forming a tubular preform at an exit of an extruder head die after which the tubular preform is then blown to the configuration of a cavity of a blow mold. The position of the preform relative to ... | 10/26/1993 |
| 5198161 | Parison thickness control method A parison thickness control system includes an extruder die and a mandrel which are movable relative to each other to change wall thickness of a parison extruded between the extruder die and the mandrel during an extrusion or forming cycle of the parison.... | 03/30/1993 |
| 5185109 | Extrusion blow-molding machine control Extrusion of a tubular parison for blow molding is controlled according to a program of set point data defining parison wall thicknesses and extrusion rates. Progress of purge of plasticized material from an accumulator through a variable annular gap is m... | 02/09/1993 |
| 5133911 | Multilayer parison extruder and method An extruder for extruding a multilayer parison and a method for doing the same. The extruder includes a cylinder having a cylindrical hole and a die slit which extrudes a parison, a ring piston movably fitted in the cylindrical hole, a multilayer head pro... | 07/28/1992 |
| 5110519 | Process for minimizing disturbance of multi-layer laminate material in extrusion of multi-layer preforms for blow molding of hollow bodies In a process and apparatus for the production of hollow bodies from thermoplastic material, the walls of the hollow bodies are of a laminate structure having at least first and second layers, by means of extrusion blow molding, the pressure within the ext... | 05/05/1992 |
| 5102588 | Method of controlling the position of an extruded preform in a blow mold A method of making tubular bodies from thermoplastic material by extruding a parison through an extruder head die slit which is then expanded in a blow mold. The position of the parison and particularly a thickened portion thereof is regulated and/or cont... | 04/07/1992 |
| 5100607 | Blow-molding methods to form containers having upper and lower sections of different thicknesses A plastic container having base and sidewall portions is provided with corrugations as a unitary part of the sidewall portion. The sidewall portion is of a thickness that would not be capable of supporting itself without the unitary corrugations. The corr... | 03/31/1992 |
| 5098634 | Method of extension blow-molding container having upper and lower sections of different thickness A container having upper and lower portions, the lower portion having self-supporting side walls and a bottom wall. The upper portion is flexible and non-self-supporting. Preferably, the upper and lower portions are formed of plastic material with the upp... | 03/24/1992 |
| 5057267 | Apparatus and method for forming hollow parisons of variable wall thickness A parison forming device is disclosed for forming hollow polymer extrudes of variable wall thickness in either the circumferential or longitudinal directions, or in any combination thereof. The parison forming device consists of a die-head assembly and ma... | 10/15/1991 |
| 5034179 | Method of and apparatus for discontinuous manufacture of multilayer, co-extruded, hose-like preforms from thermoplastics material In the discontinuous manufacture of multilayer, co-extruded, hose-like thermoplastics material preforms used in the production of large volume multilayer hollow members in a divided blow mold, at least two different annular shaped material melts are broug... | 07/23/1991 |
| 5013517 | Method of blow molding integral press-lock container Blow molded container and related process are provided wherein a container having at least an upper, non-self-supporting, flexible portion is blow molded to include an integral press-lock type closure about its upper open end. The blow mold cavity is form... | 05/07/1991 |
| 5004578 | Process and apparatus for producing hollow bodies of thermoplastic material The invention concerns a process and an apparatus for the production of hollow bodies from thermoplastic material, the wall of which is in the form of a laminate, by extrusion blow molding. Tubular preforms for making the hollow bodies are first produced ... | 04/02/1991 |
| 4971542 | Blow molding machine with accumulator cushion regulation The invention relates to a blow molding machine for the blow molding of hollow articles, with an accumulator head (1) for producing a preform and with a blow mold for forming a hollow article from the preform. After completion of a blow molding sequence, ... | 11/20/1990 |
| 4959001 | Blow molding machine with accumulator waiting time control A blow molding machine for the blow molding of hollow articles includes an accumulator head (1) for producing a preform and a blow mold for forming a hollow article from the preform. After completion of a blow molding sequence and the filling of the accum... | 09/25/1990 |
| 4959006 | Apparatus relating to a preform with geodesic reinforcement ring A mold-core rod combination for producing a plastic preform for forming blow molded plastic bottles which comprises: a neck portion defining an opening; a tubular sidewall portion depending therefrom; and an integral base structure depending from the tubu... | 09/25/1990 |
| 4937035 | Method for manufacturing large-volume hollow bodies of plastics material having multiple-layer walls A method for manufacturing large-volume hollow bodies of plastics material with multiple-layer walls. The apparatus defines an accumulation chamber and has a nozzle outlet. A plurality of material layers are joined into a multiple-layer plastic material m... | 06/26/1990 |
| 4907957 | Molding apparatus for forming a parison and product of differing materials An apparatus for manufacturing a hollow plastic product is provided. In accordance with one aspect, into a mold half having a tubular groove portion and a projecting groove portion which projects outwardly from the tubular groove section is supplied a par... | 03/13/1990 |
| 4869862 | Method of shaping an extrusion die From the mold cross section and the position of the parison in the mold that parison wall thickness distribution (function of the wall thickness of the parison around the parison) is computed, which would result in the desired wall thickness distribution ... | 09/26/1989 |
