Maro Publications


Patents with Abstracts


Maro Topics


Patents with Abstracts

8. 8,304,052 
Friction lining
Runge et al of Schaeffler Technologies AG & Co. KG, Germany,  developed a friction lining, which has a friction part and a backing part. As a preform, wound from a strand material and treated with a binder, the friction part is subjected to hot pressing.  The backing part is subjected to hot pressing together with the preform, so that a bond is created between the friction part and the backing part by the polymerization of the binder. (RDC 12/22/2012)

7. 8,303,887 
Apparatus for the infusion of resin into a preform in a closed mould
De Vita,  Beneventi and Raffone of Alenia Aeronautica S.p.A., Italy, developed a tool for the infusion of a resin into a preform made of fiber material including a mould which can be closed around the preform and in the body of which at least one inlet duct is formed to allow resin to be injected into the mould so that the resin can be infused into the preform.  At least one reservoir which can contain the resin, is also formed in the body of the mould and is connected to the at least one inlet duct.  The mould can be inserted in an autoclave and the reservoir is configured to permit the transfer of the resin from the reservoir to the inlet duct under the effect of the temperature and of the pressure that are produced in the autoclave, thus allowing the resin to be injected into the mould. (RDC 12/21/2012)

6. 8,282,757 
Automated composite annular structure forming
Madsen et al of Alliant Techsystems Inc., Minnesota, developed an automated method to manufacture stiffened closed annular structures out of fiber reinforced composites.  The machine process allow for the automated forming of continuous or discontinuous material into stiffened annular structures on constant cross section, including partial plies in local locations. It is a continuous wrapping process of the material to lay up a full circumferential ply with roller compaction and forming on a ply by ply basis. This allows automated manufacture and produces a part with superior specific strength characteristics at a lower cost than a hand lay-up without the need for intermediate debulks.  Materials used to form the composite structures are generally described as ply layers. The ply layers can be made of any materials that exhibit desired characteristics including but not limited to prepreg material and dry fiber material. The prepreg material and the dry fiber material can include, but is not limited to tapes, woven fabrics, non-woven fabrics and non-crimp fabrics. (RDC 10/11/2012)

5. 8,282,756 
Method of making a fiber preform for manufacturing parts of a composite material of the carbon/carbon type incorporating ceramic particles, and products obtained thereby
Baud and Giraud of Messier-Bugatti, France, impregnated one or more two-dimensional fiber fabrics of carbon or carbon precursor fibers by a solution or a suspension capable of allowing a dispersion of discrete ceramic particles to remain in the fiber fabric, and a fiber preform is made by superposing plies formed of two-dimensional fabric made of carbon or carbon precursor fibers, the plies being bonded to one another, and at least some of the plies being at least partially formed of a previously-impregnated two-dimensional fabric. The field of application is particularly that of friction parts made of C/C composite material with incorporated ceramic particles. (RDC 10/11/2012)

4. 8,257,073 
Oven for the thermal conditioning of preforms, comprising a ventilation plenum
Quetel and Demare of Sidel Participations, France,  developed an oven for the thermal conditioning of preforms made of thermoplastic, is moved upstream to downstream by an air stream for cooling the performs. (RDC 9/7/2012)

3. 8,231,376 
Metal mold for compression forming
Iwakiri et al of Toyo Seikan Kaisha, Ltd., Japan, developed a metal mold for forming a preform which reduces the hitting of metal molds at a portion where a slide insert metal mold and a cavity metal mold undergo the sliding yet maintaining the pressure.  The metal mold  for forming the preform includes a slide insert metal mold split into at least two for forming at least a nozzle portion of the preform, wherein a pressure is maintained by using a fitting portion which includes a preform-forming portion of the slide insert metal mold coupled together from the split state and a cavity metal mold. Auxiliary fitting portions where the slide insert metal mold and the cavity metal mold undergo the sliding is formed at a position of not forming the preform separate from the fitting portion that includes the preform-forming portion. (RDC 8/7/2012)

2. 8,211,520
Synthetic resin bottle having a gradation pattern, and process for injection molding the preform for use in such a bottle
Abe et al of Yoshino Kogyosho Co., Ltd., Japan, changed the thickness of the colored resin layer of the preform gradually in the upward or downward direction, by utilizing a tendency of gradual decrease in the thickness of the colored resin layer caused by the flow of the main resin inside the preform mold when the main resin and the colored resin are injected into the mold.  The objects of this invention is to provide a biaxially drawn, blow molded bottle having new decorativeness created in which sophisticated color gradations associated with color density are created in the body of this bottle.  The means of accomplishing this object involves adjusting the injection pattern including the time of starting and ending the supply of the main resin and the colored resin, and pressure or velocity profiles, reducing the thickness of the colored resin layer in the multi-layered molten resin fluid gradually at an upstream or downstream point of the flow, injection-molding the preform in which a color-gradated portion associated with the thickness of the colored resin layer has been formed, and biaxially drawing and blow molding this preform into a bottle having a color-gradated portion associated with the color density or color shade created on the body of the bottle. (RDC 7/9/2012)

1. 8,192,662 
Processes for producing perform and FRP
Asahara, Odani and Wadahara of Toray Industries, Japan, developed a preform, formed reinforcing fiber substrates stacked to each other and each made of at least reinforcing fiber yarns with a thermoplastic resin, interlaminated between the layers of the reinforcing fiber substrates in the preform, and has through holes extending through a plurality of the reinforcing fiber substrates in the thickness direction of the preform.  By improving the impregnability in the thickness direction of the preform, an FRP excellent both in various mechanical properties and in matrix resin impregnation and stabler in quality can be produced with high productivity. (RDC 6/18/2012)


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(RDC 6/5/2012)


Roger D. Corneliussen

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921


Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen

** Date of latest addition; date of first entry is 6/18/2012.