公开(公告)号：US11884004B2

公开(公告)日：2024-01-30

申请号：US17278779

申请日：2019-11-12

Applicant: Massachusetts Institute of Technology

Inventor： Abhinav Rao ,  Anastasios John Hart

IPC: B29C64/135 ,  B29C64/268 ,  B29C64/40 ,  B29C71/00 ,  B33Y10/00 ,  B33Y40/20 ,  B29K105/00 ,  B29K105/24

CPC classification number: B29C64/135 ,  B29C64/268 ,  B29C64/40 ,  B29C71/0009 ,  B33Y10/00 ,  B33Y40/20 ,  B29K2105/0002 ,  B29K2105/243

Abstract: Systems and methods for making it easier to remove support structures printed in conjunction with printing an object using stereolithographic additive manufacturing are disclosed. In some exemplary embodiments, one or more interfaces between the printed object and the support structures are modulated to allow for easy separation between them, in some instances even when the object and support structures are made from the same material. Various modulation techniques are disclosed, including adjusting an intensity of exposure to light at interfaces between the object and support structures, and using two materials where one material cures at two wavelength ranges and the other material only cures at one of the two wavelength ranges. Other systems and methods that allow for easy separation of part and support structure are also described.

公开(公告)号：US11642806B2

公开(公告)日：2023-05-09

申请号：US16711524

申请日：2019-12-12

Applicant: The Gillette Company LLC ,  Massachusetts Institute of Technology

Inventor： Neville Sonnenberg ,  Abhinav Rao ,  Anastasios John Hart ,  Paul Kitchen

IPC: B26B21/58 ,  B26B21/40 ,  B29C35/08 ,  B29C39/00 ,  B29C39/02 ,  C08L1/02 ,  C08L63/00 ,  C08J5/04 ,  B29C43/02 ,  B29C33/00 ,  B29C37/00 ,  B29C33/56 ,  B29K1/00 ,  B29K105/00

CPC classification number: B26B21/58 ,  B26B21/4068 ,  B29C33/005 ,  B29C33/56 ,  B29C35/0805 ,  B29C37/0067 ,  B29C39/006 ,  B29C39/026 ,  B29C43/021 ,  B29C43/027 ,  C08J5/045 ,  C08L1/02 ,  C08L63/00 ,  B29C2035/0827 ,  B29C2037/92 ,  B29C2043/029 ,  B29K2001/00 ,  B29K2105/0061

Abstract: A novel cutting-edge structure and method and apparatus for manufacturing the cutting-edge structure is provided. The cutting-edge structure is comprised of naturally derived or renewable material at greater than 50% by volume fraction. In one embodiment, the naturally derived material is a cellulose nanostructure such as a cellulose nanocrystal. The cellulose nanocrystal is processed using a base or mold structure to provide a cutting edge of any shape such as linear or circular edge structures. The process includes dual cure steps to produce an optimal cutting-edge structure without shrinkage. The formed cutting-edge structure can be utilized as a razor blade as it is formed with very sharp tip and edge suitable for cutting hair. The base structure can form one or more cutting-edge structures simultaneously.

公开(公告)号：US10828878B2

公开(公告)日：2020-11-10

申请号：US15908282

申请日：2018-02-28

Applicant: Massachusetts Institute of Technology

Inventor： Sanha Kim ,  Anastasios John Hart ,  Piran Ravichandran Kidambi ,  Dhanushkodi Durai Mariappan

IPC: B32B37/00 ,  B32B38/00 ,  B32B41/00 ,  B32B9/00 ,  B32B27/06 ,  H05K3/02 ,  H05K1/09 ,  B82Y10/00 ,  H01L29/16

Abstract: Systems, devices, and related methods are disclosed for electromechanical transfer printing of 2D materials disposed on one substrate to another. The printing device can be configured to transfer a 2D material from a source substrate to the target substrate by applying a combination of mechanical and electrostatic forces to facilitate electromechanical adhesion between the 2D material layer and the target substrate. Some embodiments of the printing device can effect direct transfer printing of a 2D material from a source substrate to a target substrate without the use of etchants and adhesives.

公开(公告)号：US10814348B2

公开(公告)日：2020-10-27

申请号：US15949040

申请日：2018-04-09

Applicant: Massachusetts Institute of Technology ,  UNIVERSITY OF MICHIGAN

Inventor： Anastasios John Hart ,  Justin Douglas Beroz ,  Homayoon Maghsoodi

IPC: B05D1/12 ,  B05B5/00 ,  B05B5/025 ,  B05B12/06 ,  B05D3/14 ,  B05D1/06

Abstract: A particle can be discretely ejected from a orifice.

公开(公告)号：US10583677B2

公开(公告)日：2020-03-10

申请号：US15833105

申请日：2017-12-06

Applicant: Massachusetts Institute of Technology

Inventor： Anastasios John Hart ,  Sanha Kim ,  Hossein Sojoudi ,  Karen K. Gleason

IPC: B41K3/56 ,  B41K1/50 ,  B41M1/04 ,  B41F5/24 ,  B41F31/00 ,  B41N1/12

Abstract: Methods of printing nanoparticulate ink using nanoporous print stamps are disclosed. A nanoporous print stamp can include a substrate, a patterned arrangement of carbon nanotubes disposed on the substrate, and a secondary material disposed on the carbon nanotubes to reduce capillary-induced deformation of the patterned arrangement of carbon nanotubes when printing nanoparticulate ink. Some methods include loading a nanoporous print stamp with nanoparticulate colloidal ink such that the nanoparticulate colloidal ink is drawn into microstructures of the patterned arrangement of carbon nanotubes via capillary wicking. Nanoparticulate colloidal ink can include nanoparticles dispersed in a solution. The method also includes contacting a nanoporous stamp to a target substrate to form nanoscale contact points between the target substrate and the patterned arrangement of carbon nanotubes of the nanoporous print stamp so that nanoparticulate colloidal ink is drawn out of the nanoporous print stamp and onto the target substrate to form a pattern.

公开(公告)号：US20200047093A1

公开(公告)日：2020-02-13

申请号：US16341326

申请日：2017-10-18

Applicant: Massachusetts Institute of Technology

Inventor： Michael S. Bono ,  Sydney B. Beasley ,  Emily Barret Hanhauser ,  Chintan Vaishnav ,  Anastasios John Hart ,  Rohit Nandkumar Karnik

IPC: B01D35/06 ,  B01L3/00 ,  G01N1/10

Abstract: Systems, devices, and methods for detecting contamination (e.g., bacteria) in fluid are provided. The systems, devices, and methods allow for filtering a fluid sample using a filter to capture and concentrate cells (e.g., bacteria) to detect electrochemical properties thereof. The cells can be exposed to a reagent that diffuses into the cells to produce a product of interest that can be used in analysis of the fluid sample. The product of interest can diffuse out of the filter into a fluid storage component for detection and analysis by an analysis component. After the sampling is completed, the filter can be detached and discarded. Other aspects of the present disclosure, including enhancements and various systems and methods for concentrating cells and analyzing the same, are also provided.

公开(公告)号：US20190240845A1

公开(公告)日：2019-08-08

申请号：US16268381

申请日：2019-02-05

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： Anastasios John Hart ,  Sanha Kim

IPC: B25J15/00 ,  H02N13/00 ,  B81B3/00

CPC classification number: B25J15/0085 ,  B81B3/0054 ,  B81B2201/13 ,  H02N13/00

Abstract: Controllable electromechanical adhesive devices including three-dimensional dielectrically-coated microstructures that are mechanically compliant are provided. The microstructures can be controlled to provide tunable electromechanical surface adhesion, allowing for dexterous gripping of microscale and/or macroscale objects. For example, the devices can tune the surface adhesion strength of one or more microstructures without complex mechanical actuation in a wide range of on/off ratios with low voltage. The devices can be configured as a force sensor capable of providing tactile feedback for determining the load applied against the microstructures by the surface of an object. For example, the devices can provide output indicative of changes in an electrical property of one or more microstructures for determining the applied load of an object. The devices can be pixelated or otherwise configured to provide localized force sensing and/or surface adhesion. Related systems and methods for controlling the disclosed electromechanical adhesive devices are also described.

公开(公告)号：US20180244027A1

公开(公告)日：2018-08-30

申请号：US15908282

申请日：2018-02-28

Applicant: Massachusetts Institute of Technology

Inventor： Sanha Kim ,  Anastasios John Hart ,  Piran Ravichandran Kidambi ,  Dhanushkodi Durai Mariappan

IPC: B32B37/00 ,  B32B38/00 ,  B32B41/00 ,  B32B27/06 ,  B32B9/00

CPC classification number: B32B37/025 ,  B32B9/005 ,  B32B27/06 ,  B32B38/0008 ,  B32B41/00 ,  B32B2038/0052 ,  B32B2307/204 ,  B82Y10/00 ,  H01L29/1606 ,  H05K1/097 ,  H05K3/025 ,  H05K2203/0152

Abstract: Systems, devices, and related methods are disclosed for electromechanical transfer printing of 2D materials disposed on one substrate to another. The printing device can be configured to transfer a 2D material from a source substrate to the target substrate by applying a combination of mechanical and electrostatic forces to facilitate electromechanical adhesion between the 2D material layer and the target substrate. Some embodiments of the printing device can effect direct transfer printing of a 2D material from a source substrate to a target substrate without the use of etchants and adhesives.

公开(公告)号：US09883685B2

公开(公告)日：2018-02-06

申请号：US14707167

申请日：2015-05-08

Applicant: Massachusetts Institute of Technology

Inventor： Kristine A. Bunker ,  Jamison Go ,  Anastasios John Hart ,  Kyle N. Hounsell ,  Donghyun Kim

IPC: A23G9/28 ,  A23G9/20 ,  A23G9/44 ,  B33Y70/00 ,  A23P20/20 ,  B33Y30/00 ,  B33Y10/00 ,  A23P20/25 ,  B29C64/106

CPC classification number: A23G9/28 ,  A23G9/20 ,  A23G9/44 ,  A23P20/20 ,  A23P2020/253 ,  B29C64/106 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00

Abstract: Fused deposition model printer system. The system prints cold slurry substances and includes a source of a cold slurry substance with a print platform supported for at least three axes of motion under computer control. An extruder head system including a nozzle extrudes a stream of the cold slurry substance from the source onto the print platform, the extruder head including a heater. A cryogen line is provided having a perforated section for surrounding the continuous stream of the cold slurry substance to spray a cryogen onto the cold slurry substance to cool it upon extrusion. A chilled compartment or freezer is provided in which the print platform, extruder head system, and cryogen line are contained to maintain those components at a selected temperature whereby the cold slurry substance is printed to form a desired three dimensional shape.

公开(公告)号：US20170151704A1

公开(公告)日：2017-06-01

申请号：US15260813

申请日：2016-09-09

Applicant: Massachusetts Institute of Technology

Inventor： Jamison Go ,  Anastasios John Hart

IPC: B29C47/00 ,  B33Y30/00 ,  B33Y10/00

Abstract: Printing devices and methods are provided that utilize high throughput extrusion to generate a printer material, such as a three-dimensional object. High-throughput extrusion systems in accordance with the present disclosure volumetrically pre-heat an extruded filament to a desired pre-heat temperature, and then either maintain or heat the extruded filament to a desired melt temperature prior to having the filament extruded out of the system and onto a surface, such as a build platform. By pre-heating the filament prior to heating it to the temperature at which it is excluded, it helps increase the throughput of the system. Likewise, by doing the heating volumetrically, it further helps increase the throughput of the system. Various embodiments of devices and methods typically used for printing in conjunction with the disclosed high throughput systems are also provided for in the present disclosure.