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    Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations
    31.
    发明授权
    Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations 失效
    克服最小重涂深度限制的简化立体光刻物体形成方法

    公开(公告)号：US5902538A

    公开(公告)日：1999-05-11

    申请号：US920428

    申请日：1997-08-29

    Applicant: Theodore R. Kruger ,  Chris R. Manners ,  Hop D. Nguyen

    Inventor： Theodore R. Kruger ,  Chris R. Manners ,  Hop D. Nguyen

    IPC: B29C41/12 ,  B29C41/36 ,  B29C67/00 ,  B29C35/08 ,  B29C41/02

    CPC classification number: B29C67/0062 ,  B29C41/12 ,  B29C41/36 ,  B29C67/0092

    Abstract: A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making high resolution objects utilizing low resolution materials which are limited by their inability to reliably form coatings of a desired thickness. The formation of coatings of such materials is limited to a Minimum Recoating Depth (MRD), when formed over entirely solidified laminae, which is thicker than the desired layer thickness or object resolution. Data manipulation techniques result in layers of material (and laminae) of the object being categorized as non-consecutive primary layers (laminae) and secondary layers (laminae) positioned intermediate to the primary layers (laminae). Substantially, all portions of primary laminae are exposed in association with primary layers and portions of the secondary laminae are formed in association with their respective secondary layers while other portions of the secondary laminae are formed in association with primary layers so as to form the object with a higher resolution than that dictated by the spacing between the primary layers. Recoating techniques are described which can be used when the thickness between consecutive layers is less than a leading edge bulge phenomena that results from the use of a particular recoating device such that direction of sweeping and/or order of sweeping of the recoating device is varied between consecutive primary layers.

    Abstract translation: 用于利用低分辨率材料制造高分辨率物体的快速成型和制造（例如立体光刻）方法和装置，其受到不能可靠地形成期望厚度的涂层的限制。 这种材料的涂层的形成被限制在最小再沉积深度（MRD）时，当在完全凝固的层上形成时，该厚度比所需的层厚度或物体分辨率厚。 数据处理技术导致被分类为非连续主层（层）的物体层（和层）层以及位于主层（层）之间的二层（层）。 基本上，初级层的所有部分与主层相关联地暴露，并且次级层的部分与它们各自的次层相关联地形成，而次层的其它部分与主层相关联地形成以形成物体， 分辨率高于主层之间间距所规定的分辨率。 描述了当连续层之间的厚度小于由使用特定重涂装置引起的前缘凸起现象时，可使用再现技术，使得重涂装置的扫掠方向和/或扫描顺序在 连续的主要层。

    Reconstituted tobacco sheets and methods for producing and using the same
    33.
    发明授权
    Reconstituted tobacco sheets and methods for producing and using the same 失效
    重组烟草片及其制备和使用方法

    公开(公告)号：US5724998A

    公开(公告)日：1998-03-10

    申请号：US697123

    申请日：1996-08-20

    Applicant: Grant Gellatly ,  Gus Keritsis ,  Susan E. Wrenn

    Inventor： Grant Gellatly ,  Gus Keritsis ,  Susan E. Wrenn

    IPC: A24B3/14 ,  A24B15/14 ,  A24D1/02 ,  B29C41/12 ,  A24B15/00

    CPC classification number: A24B3/14 ,  A24B15/14

    Abstract: Reconstituted tobacco sheets manufactured from tobacco dust and binder are described herein. More particularly, the tobacco dust has a mean particle size in the range of from about 60 mesh to about 400 mesh to afford reconstituted tobacco sheets having about 80% to about 90% tobacco content with improved quality and survivability. The reduced particle size of the tobacco dust allows an increase in the solids content of the slurry without an increase in slurry viscosity. The increased solids content reduces the drying load of the cast sheet thereby allowing an increased production rate. The reconstituted tobacco sheets may be prepared from a slurry comprising tobacco dust and binder that may be subjected to a means for removing air trapped within the slurry before casting the slurry into sheets. An apparatus for determining the amount of air trapped within the slurry prepared according to the process of the present invention is also described herein.

    Abstract translation: 本文描述了由烟草粉尘和粘合剂制成的重组烟草片。 更具体地，烟草粉末的平均粒度在约60目至约400目的范围内，以提供具有改善质量和生存性的烟草含量约80％至约90％的重构烟草片。 烟草粉尘的减小的粒度允许浆料的固体含量的增加而不增加浆料粘度。 增加的固体含量降低了铸片的干燥负荷，从而允许增加的生产率。 重构烟草片可以由包含烟草粉尘和粘合剂的浆料制备，所述浆料可以在将浆料浇铸成片材之前经受​​用于除去捕集在浆料内的空气的装置。 本文还描述了一种用于确定根据本发明的方法制备的浆料中捕集的空气量的装置。

    Thermal stereolithography
    35.
    发明授权
    Thermal stereolithography 失效

    公开(公告)号：US5695707A

    公开(公告)日：1997-12-09

    申请号：US441709

    申请日：1995-05-15

    Applicant: Thomas A. Almquist ,  Dennis R. Smalley

    Inventor： Thomas A. Almquist ,  Dennis R. Smalley

    IPC: B29C41/12 ,  B29C41/36 ,  B29C67/00 ,  G03C9/08 ,  G03F7/00 ,  G03F7/20 ,  B29C35/08 ,  B29C41/02

    CPC classification number: B29C67/0066 ,  B29C41/12 ,  B29C41/36 ,  B29C67/0062 ,  B29C67/0074 ,  B29C67/0092 ,  G03F7/0037 ,  G03F7/70375 ,  G05B2219/49013 ,  G05B2219/49015 ,  G05B2219/49039

    Abstract: Apparatus for and related methods of forming three-dimensional objects out of a building material, which is normally solid, but which is flowable when heated. In one embodiment, a support material is used to fill in portions of layers which are not to be solidified as part of the object, thus providing support to otherwise unsupported portions of other layers. Advantageously, the support material is also normally solid and flowable when heated, and has a lower melting point than the building material enabling the support material to later be removed without damaging the object. In an alternative embodiment this support material can be used to build a support such as a web support, or the like, for supporting an object surface from a second surface. In another alternative embodiment, such an apparatus is combined with a conventional stereolithographic apparatus to provide means for forming an object out of conventional stereolithographic materials, but utilizing a normally solid but thermally-flowable support material to provide support to the object, either on a layer-by layer basis, or by building supports such as web supports.

    Thermal stereolithography
    36.
    发明授权
    Thermal stereolithography 失效
    热立体光刻

    公开(公告)号：US5676904A

    公开(公告)日：1997-10-14

    申请号：US457958

    申请日：1995-06-01

    Applicant: Thomas A. Almquist ,  Dennis R. Smalley

    Inventor： Thomas A. Almquist ,  Dennis R. Smalley

    IPC: B29C41/12 ,  B29C41/36 ,  B29C67/00 ,  G03C9/08 ,  G03F7/00 ,  G03F7/20 ,  B29C35/08 ,  B29C41/02

    CPC classification number: B29C67/0066 ,  B29C41/12 ,  B29C41/36 ,  B29C67/0062 ,  B29C67/0074 ,  B29C67/0092 ,  G03F7/0037 ,  G03F7/70375 ,  G05B2219/49013 ,  G05B2219/49015 ,  G05B2219/49039

    Abstract: Apparatus for and related methods of forming three-dimensional objects out of a building material, which is normally solid, but which is flowable when heated. In one embodiment, a support material is used to fill in portions of layers which are not to be solidified as part of the object, thus providing support to otherwise unsupported portions of other layers. Advantageously, the support material is also normally solid and flowable when heated, and has a lower melting point than the building material enabling the support material to later be removed without damaging the object. In an alternative embodiment this support material can be used to build a support such as a web support, or the like, for supporting an object surface from a second surface. In another alternative embodiment, such an apparatus is combined with a conventional stereolithographic apparatus to provide means for forming an object out of conventional stereolithographic materials, but utilizing a normally solid but thermally-flowable support material to provide support to the object, either on a layer-by layer basis, or by building supports such as web supports.

    Abstract translation: 从建筑材料中形成三维物体的装置和相关方法，其通常是固体，但是当加热时它是可流动的。 在一个实施例中，支撑材料用于填充不被凝固的部分层，作为物体的一部分，从而为其它层的其它未支撑的部分提供支撑。 有利地，支撑材料在加热时也通常是固体和可流动的，并且具有比建筑材料低的熔点，使得能够在不损坏物体的情况下移除支撑材料。 在替代实施例中，该支撑材料可用于构建支撑件，例如幅材支撑件等，用于从第二表面支撑物体表面。 在另一替代实施例中，这种装置与传统的立体光刻设备组合以提供用于从常规立体光刻材料形成物体的装置，但是使用通常为固体但热可流动的支撑材料来提供对物体的支撑， 或通过构建诸如web支持的支持。

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