rp-ml-digest V2 #336

From: rp-ml-digest (owner-rp-ml-digest@ltk.hut.fi)
Date: Thu Sep 04 1997 - 21:41:03 EEST

 rp-ml-digest Thursday, September 4 1997 Volume 02 : Number 336

 Topics covered in this digest:
 Rapid Tooling information source?
 The Father of an Industry
 Rapid Tooling information source?
 Re: The Father of an Industry


 Date: Thu, 04 Sep 1997 14:15:23 +0900
 From: Whie Chang <wchang1@chollian.dacom.co.kr>
 Subject: Rapid Tooling information source?


 Can anyone please give names of journals, books in which I
 can find papers or technical information on rapid tooling, esp.
 epoxy tooling?


 Whie Chang
 Dept. of Mold and Die
 Seoul National Polytechnic University

 email: wchang1@chollian.dacom.co.kr


 Date: Thu, 04 Sep 1997 08:36:32 -0400
 From: AAROFLEX <aaroflex@aaroflex.com>
 Subject: The Father of an Industry

 I have realized that there is a lot of misinformation and confusion
 about the origins of 3d printing using photocurable resins. I have
 prepared the following to generate some debate and perhaps dispell some
 of the myths surrounding this technology.

 The Father of an Industry

 When I first began working on 3D printing utilizing photo-curable
 resins, I felt very smug and proud that I was the first person in the
 world to think of and invent such a machine. The initial demonstration
 of my proof of concept model was to a small group including a high
 ranking engineer with Rockwell who was very instrumental in the design
 and building of the B-2 bomber. His first comment, upon demonstration of
 my machine, was that a small company in California has already developed
 and commercialized such a device. He subsequently sent literature on the
 west coast machine. At that point I realized that I was definitely not
 the first person in the world to think of this idea, and, more than
 likely, there were several others who had worked on this idea as well.

 I decided not to invest additional funds in the development of the
 machine until I could establish a sound patent position. During the
 literature research phase, my staff and I soon discovered what I had
 suspected=97that others had worked on this idea long before the founder o=
 the California company had left DuPont to begin his quest of this idea.
 Among the early developers of 3D printing with photo-curable resins was
 Otto John Muntz. His concept, referred to as "photo-glyph recording" was
 first introduced into the public domain upon the expiration of his U.S.
 patent 2,775,758 in 1973. In 1981, a Japanese researcher by the name of
 Hideo Kodama, published an article concerning his research on the
 concept of 3D printing entitled Automatic method for fabricating a
 three-dimensional plastic model with photo-hardening polymer (1981
 American Institute of Physics) in which he discussed fabricating solid
 models by stacking cross-sectional layers of photo-hardening polymer. In
 1982, Allen Herbert, of 3M company, published an article, Solid Object
 Generation (Journal of Applied Photographic Engineering, Vol. 8, No. 4,
 Aug. 1982), in which he discussed using a laser beam to selectively
 solidify a photo-polymer to sketch and stack cross-sectional layers to
 create a three-dimensional object.

 During our research, we collected over 5000 pages of documents
 pertaining to this 3D printing process. By that time, we had accumulated
 enough research and established a sound patent position that we were
 able to begin developing and commercializing my version of the 3D
 printer using photo-curable resins, the AAROFLEX Solid Imager=99.

 When we began commercialization of the Solid Imager, we had every
 document known to us in the world on the subject except for one patent
 document by Frenchmen E. Luzy and C. Dupuis. The French patent 461,600,
 established in 1912, discussed the concept of using light to create
 objects. Recently, a source of this information was provided, and we
 were able, to the best of our knowledge, complete our research on all
 available patents and articles on the subject.

 I was certain that Muntz could be considered the father of this
 technology, however, with the newly available information on turn of the
 century research, it may well be that the Frenchmen, Luzy and Dupuis,
 are the fathers of this technology. Of course, I would much prefer to
 believe in the old-fashioned American ingenuity as the creator of this
 concept. However, I do not believe, after my extensive research, that
 the west coast gentleman could be considered the father of this 3D
 printing technology. He is simply, as am I, the founder of an enterprise
 utilizing this technology.

 This reminds me of the German physicist, Wilhelm Roentgen who discovered
 X-rays in 1895. Although Professor Roentgen discovered X-rays, it was
 the Siemens Company that first commercialized this technology. The
 question remains: Was Professor Roentgen the father of the technology or
 was it Siemens?

 Albert C. Young, Jr., P.E.
 8550 Lee Highway, Suite 525, Fairfax, VA 22031
 703.573.0690 fax 703.849.1206


 Date: Thu, 4 Sep 1997 09:19:23 -0400
 From: Mark Littlewood <TCTRapidNews@compuserve.com>
 Subject: Rapid Tooling information source?

 Dear Whie

 Try Rapid News.

 This magazine has a North American and European version and is dedicated=

 to 'Time-Compression Technologies' - technologies that help reduce
 time-to-market. Rapid Tooling clearly has a pivotal role in this process.=

 Subscriptions are FREE to qualified readers (If you are on the rp-ml you
 will almost certainly qualify!) within the core circulation areas - Europ=
 and North America. For subscribers outside these areas, a yearly
 subscription costs $80.

 Please drop me a line if you would like to subscribe.

 With best wishes.

 Mark Littlewood

 312 558 1548 (USA)
 +44 (0) 171 352 7261 (ROW)


 Date: Thu, 04 Sep 1997 10:31:48 -0700
 From: Marshall Burns <marshall@ennex.com>
 Subject: Re: The Father of an Industry

 AAROFLEX wrote:
> I was certain that Muntz could be considered the father of this
> technology, however, with the newly available information on turn of the
> century research, it may well be that the Frenchmen, Luzy and Dupuis,
> Albert C. Young, Jr., P.E.

  Al, Don't forget Carlo Baese, a Prussian (i.e. German) citizen who
 filed for a patent on a photopolymer-based fabrication technique in
 1902, issued I think in 1904.

 Best Regards,
 Marshall Burns
 Ennex Fabrication Technologies


 End of rp-ml-digest V2 #336


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