公开(公告)号：US11214000B2

公开(公告)日：2022-01-04

申请号：US16373761

申请日：2019-04-03

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Jeffrey W. Drawe ,  James J. Spence ,  Paul M. Fromm ,  Paul N. Richards

IPC: B29C64/147 ,  G03G15/22 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/205

Abstract: An additive manufacturing system for fabricating multi-sided printed composite sheet structures includes a roll fed duplex architecture that prints polymer images on both sides of a substrate sheet to form two-sided 3D composite layers. A substrate web is fed into the machine, and a top side is printed with a wetting agent, powdered, and the excess powder is removed. The image may be pinned to the substrate in a fusing step so that the web can be inverted to print a second image on the other side. The inversion architecture could include inverting rollers, tubes or a Mobius strip that may flip the substrate for backside printing using a single imaging station. The resulting two-side powdered and pinned substrate would then be cut, stacked, heated and compressed to create a 3-D object with more polymer in the stack, resulting in better adhesive binding characteristics at a much higher production speed.

公开(公告)号：US11130291B2

公开(公告)日：2021-09-28

申请号：US16370019

申请日：2019-03-29

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Jeffrey W. Drawe

IPC: B29C64/357 ,  B29C64/147 ,  B29C64/245 ,  B29C64/209

Abstract: Apparatus and methods are disclosed for reclaiming unused powder in a composite-based additive manufacturing process. According to aspects of the embodiments, there is provided process and apparatus that use a substrate layer frame inversion mechanism that can flip the substrate over 180 degrees. The excess powder will simply drop into a waste reclaim container for later reuse. An optional mechanical vibrator may be used to completely loosen any remaining powder.

公开(公告)号：US11104077B2

公开(公告)日：2021-08-31

申请号：US16370269

申请日：2019-03-29

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Jeffrey W. Drawe

IPC: B32B41/00 ,  B29C64/393 ,  B29C64/188 ,  B29C64/147

Abstract: According to aspects of the embodiments, there is provided process and apparatus to analyze imaging problems including but not limited to detecting defects of an imaging substrate useful in a Composite-Based Additive Manufacturing (CBAM) process. Data from the at least one imaging sensor may be used to: compensate for irregularities in a substrate deposited layer; compensate for irregularities in the printed layer, such as missing jet correction; reject a layer, the layer being scrapped and re-printed; pause the print job so that maintenance or service may be performed; or provide traceability data for proof-of-work, forensic, diagnostic, or other purposes. Depending on system architecture and design goals, the imaging sensor may be employed prior to or subsequent to the deposition of a printed layer.

公开(公告)号：US11046002B2

公开(公告)日：2021-06-29

申请号：US16369286

申请日：2019-03-29

Applicant: Xerox Corporation

Inventor： Marc D. Daniels ,  Jeffrey W. Drawe

IPC: B29C64/30 ,  B29C64/112 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y70/00 ,  B29K105/00

Abstract: According to aspects of the embodiments, there is provided process and apparatus to use additives with the clear wetting agent to aid in detection of defective substrates or missing jets. For light colored substrates, dye can be used for darkening of the wetting agent to provide sufficient contrast for defect detection. For dark colored substrates, the dye could be a specific color that a sensor is tuned for. An additive that glows only in the presence of a specific wave length of light could be utilized for any color substrate. By comparing the detected pattern to the desired pattern, end product voids can be greatly reduced or eliminated.