MICROSTRUCTURE PATTERNS
    241.
    发明申请

    公开(公告)号:US20180307138A1

    公开(公告)日:2018-10-25

    申请号:US15767990

    申请日:2016-10-13

    Abstract: In one aspect, there is provided a method of creating a microstructure pattern on an exterior surface of an aircraft, boat, automobile or other vehicle is disclosed. A layer of photopolymer (44) is applied to the top coat or substrate (43) by nozzles (45). The photopolymer is selectively irradiated to activate its photoinitiator and the unirradiated polymer is removed. The irradiation can be via a mask (49) which does not come into contact with the polymer, or via a beam splitting arrangement (63, 64) or a diffraction grating (71). The pattern can be formed by either leaving the exposed photopolymer in situ, or using the exposed photopolymer to mask the substrate, etching the substrate, and then removing the exposed photopolymer. In another aspect, there is provided a method 1100 comprising the step 1102 of applying a layer of photocurable material to the exterior surface, the step 1104 of irradiating the photocurable material with radiation including a predetermined irradiation intensity profile, and the step 1106 of removing uncured photocurable material to form the microstructure pattern. The radiation initiates curing of the irradiated photocurable material, causing a curing depth profile across the layer of the photocurable material corresponding to the selected intensity pro file.

    AUTOMATED UV-LED EXPOSURE OF FLEXOGRAPHIC PRINTING PLATES

    公开(公告)号:US20180126721A1

    公开(公告)日:2018-05-10

    申请号:US15860795

    申请日:2018-01-03

    Inventor: FRANK BOYKSEN

    CPC classification number: B41C1/10 G03F7/201 G03F7/2016 G03F7/2018 G03F7/202

    Abstract: Method for producing flexographic printing plates, using as starting material a photopolymerizable flexographic printing plate which at least comprises, arranged one above another, a dimensionally stable support, at least one photopolymerizable, relief-forming layer, at least comprising an elastomeric binder, an ethylenically unsaturated compound and a photoinitiator, a digitally imagable layer, comprising at least the following steps: (a) producing a mask by imaging the digitally imagable layer, (b) exposing the flexographic printing plate through the mask with actinic light, and photopolymerizing the image regions of the layer, the exposing taking place with a plurality of UV-LEDs which are arranged on at least one UV-LED strip which is moved relative to the surface of the flexographic printing plate, and (c) developing the photopolymerized layer by washing out and drying or by thermal development, characterized in that in the UV-LED strip or in a separate strip, at least one ultrasonic sensor is arranged, at least the thickness of the flexographic printing plate for exposure is determined with the at least one ultrasonic sensor, depending on the measured thickness of the flexographic printing plate, the exposing of the flexographic printing plate is controlled in respect of at least one of the following parameters: (i) number of exposure steps, (ii) exposure intensity, (iii) energy input per exposure step, (iv) duration of the individual exposure steps, (v) overall duration of exposure.

    APPARATUS FOR PATTERNING HYDROGELS INTO MULTI-WELL PLATES

    公开(公告)号:US20180011408A1

    公开(公告)日:2018-01-11

    申请号:US15645979

    申请日:2017-07-10

    Applicant: Cypre, Inc.

    Abstract: The inventive subject matter provides an apparatus for reproducibly fabricating hydrogel-based organ and tumor models inside multi-well plates. For example, tumor models made using the inventive apparatus can be used for studying the progression of cancer, cancer diagnostics, and therapeutic screening. A mold controls the thickness of each hydrogel layer. A photomask controls the size and shape of each hydrogel layer, allowing the hydrogel diameter to be smaller than the diameter of each well so that liquid media can be exchanged around both the sides and top of the hydrogels. A holder aligns the photomask with the multi-well plate, and polymerization is initiated by a light source.

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