Patent application number | Description | Published |
20140343210 | PROCESS FOR SYNTHESIZING CARBON NANOTUBES ON MULTIPLE SUPPORTS - The present invention relates to a process for synthesizing carbon nanotubes by continuous chemical vapour deposition at the surface of reinforcements, said reinforcements constituting a mixture A (i) of particles and/or fibres of a material comprising at least one oxygen atom and (ii) of particles and/or fibres of a material chosen from carbides and/or of a material comprising at least one silicon atom, said process comprising the following steps, carried out under a stream of inert gas(es) optionally as a mixture with hydrogen: (i) heating of said mixture of reinforcements A in a reaction chamber at a temperature ranging from 400° C. to 900° C.; (ii) introducing into said chamber a source of carbon consisting of acetylene and/or xylene, and a catalyst comprising ferrocene; (iii) exposing said heated mixture A to the source of carbon and to the catalyst comprising ferrocene for a sufficient time to obtain carbon nanotubes at the surface of the reinforcements constituting said mixture A; (iv) recovering a mixture B at the end of step (iii), optionally after a cooling step, said mixture B consisting of the mixture (A) of reinforcements comprising carbon nanotubes at their surface; (v) optionally, separation (a) of the particles and/or fibres of a material comprising at least one oxygen atom, (b) of the particles and/or fibres of a material chosen from carbides and/or of a material comprising at least one silicon atom. | 11-20-2014 |
20150056447 | ENHANCING THE ADHESION OR ATTACHMENT OF CARBON NANOTUBES TO THE SURFACE OF A MATERIAL VIA A CARBON LAYER - The present invention relates to a method for enhancing the adhesion of CNTs to the surface of a material, including the following steps carried out under an inert gas current or currents optionally mixed with hydrogen: (i) heating the material including CNTs on the surface thereof in a reaction chamber, to a temperature of between 500° and 1,100° C.; (ii) introducing into said chamber a carbon source consisting of acetylene and/or xylene, in the absence of a catalyst; (iii) exposing the heated material to the carbon source for a period of time sufficient to ensure the production of a carbon layer of controlled thickness on the surface of said material and said CNTs covering same, as shown in the figure below; and (iv) optionally recovering the material thus covered after cooling, upon completion of step (iii). The invention likewise relates to hybrid carbon-coated reinforcements and to the uses thereof for preparing structural and functional composite materials or for preparing paints or varnishes and wires. | 02-26-2015 |
Patent application number | Description | Published |
20080304005 | Eyewear Frames With Mechanical Lock Lens Attachments - The present invention relates to partial rim eyewear or eyeglasses having impact resistant prescription lenses and mechanically secured to the frame. The eyeglasses are particularly useful for athletic activity because they are lightweight and offer a wide field of vision because they do not comprise of a full rim. The lenses are to be prescription either tinted, or clear, with or without coatings that may be preferred for use with athletic activities. The mechanical lock attachment to secure each lens in place can include adhesives or double sided adhesive tape, notches in the partial rim frame with corresponding protrusions in the lens, with or without a lock clip engaging the lens and a locking pin engaging the lock clip; and/or a screw, adhesive or double-sided tape. Advantageously, the lenses are impact resistant and are securely attached to the frame via these different mechanical attachments. The mechanical attachments can be constructed so that it is difficult to remove it from the frame, making or is a permanent attachment, thereby securely locking the lens in place even under severe impact. In additional embodiments, the mechanical lock attachment can include a double bar support or a single bar support. The double bar support pivots over the lenses and is locked to the frame with a pin or screw or other method. The single bar support is positioned over the lenses and is locked to the frame with a bar clip, pin or screw engaging the nose piece, and double sided adhesive tape can be added for additional strength. | 12-11-2008 |
20090051866 | Adaptor for securing eyewear lenses to a frame and a method of using the same - An adaptor to be affixed to an eyeglass lens and received in an eyeglass frame, to facilitate the fitting and replacement of various shapes of lenses into a variety of eyeglass frames, particularly, rimless and partial rim frames, wing frames, three-piece frames and frames with complex shapes. | 02-26-2009 |
20090257019 | Eyewear frames with magnetic lens attachements - The present invention illustrates various methods of attaching a pair of eyeglass lenses or a lens shield to an eyeglass frame using magnets or magnetically attractive material. The magnetic attachment methods are beneficial because they allow the user to have interchangeable lenses or shields for indoor and outdoor use, enhancing their visual acuity during work or play. The lenses may be tinted, prescription, protective eyewear, or plano. The magnetic lenses are convenient and user friendly, allowing intuitive, tool-less interchangeability with no need to twist or stress the frame. These methods of attachment require no specific instructions or tools when the user replaces lenses. | 10-15-2009 |
20130235325 | DETACHABLE LENSES FOR EYEWEAR - Modular eyewear includes a frame and lens assemblies insertable into and removable from the frame which has a rim located between a bridge and each of two temples. Each rim includes a front face, a groove adjacent to the bridge, and an indentation adjacent to the temple. Attached along each of the groove and the indentation are frame magnets. The lens assemblies include a lens having a perimeter surrounding a body with front and rear surfaces. A tab is applied to and extends from the front surface of each lens at the perimeter. Magnetic couplings are attached along a first portion of the perimeter behind the tab and along a second portion of the perimeter, respectively. When the eyewear is assembled, the frame magnets magnetically attach to the corresponding magnetic couplings, and the tab is inserted into the indentation to fill the indentation flush with the frame front face. | 09-12-2013 |
20130271722 | EYEWEAR FRAMES WITH MAGNETIC LENS ATTACHMENTS - The present invention illustrates various methods of attaching a pair of eyeglass lenses or a lens shield to an eyeglass frame using magnets or magnetically attractive material. The magnetic attachment methods are beneficial because they allow the user to have interchangeable lenses or shields for indoor and outdoor use, enhancing their visual acuity during work or play. The lenses may be tinted, prescription, protective eyewear, or plano. The magnetic lenses are convenient and user friendly, allowing intuitive, tool-less interchangeability with no need to twist or stress the frame. These methods of attachment require no specific instructions or tools when the user replaces lenses. | 10-17-2013 |