I think the design and use of the tool is well thought out. The only
shortcomings with the design is that it can't be used to test short sharp
surfaces (particularly points) and that the 'tape heads' sometimes rotate and
won't stay in contact with the surface to be tested. I just think the test is
too easy to pass. Perhaps the tape should be softer and easier to cut? A
stop-gap idea could be to adjust the pass/fail criteria to prohibit cutting
the first layer of tape, instead of all the layers, but I've found that even
the first layer is pretty tough.
-Ken A.
On Fri, Feb 12, 2010 at 8:25 AM, Richard Pittenger
<richard.pitten...@hobartcorp.com> wrote:
Peter and Forum,
This discussion brings back some old memories for me. I worked at UL
back in
the 1970’s and shared a cubicle at that time with the engineer that
developed the sharp edge tester. Peter’s comments pretty well summarizes the
reasoning behind the development of the tester as a way to put more
objectivity into the determination of whether or not an edge is too sharp.
I can’t comment whether or not the tester fully achieved its goal and
purpose but I do know that a lot of time and effort went in to its
development.
Good day,
Richard I. Pittenger
Agency Approval Engineer
Food Retail Systems
Hobart
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of peter
merguerian
Sent: Friday, February 12, 2010 12:30 AM
To: emc-p...@ieee.org; sudhakar wasnik
Cc: pe...@goglobalcompliance.com
Subject: Re: UL 1439 standard genesis
Sudhakar,
Many UL Standards call out "an edge, projection, or corner of an enclosure,
opening, frame, guard, knob, handle, or the like, shall be smooth, well
rounded, and not sufficiently sharp to constitute a hazard.” Manufacturers
had no way to determine what constitutes a smooth, well rounded and not
sufficiently sharp edge. UL developed the UL 1439 standard many years ago as a
means to determine acceptability of a sharp edge. I believe today UL1439 is
referenced in many of the UL standards.
Best Regards,
Peter Merguerian
Go Global Compliance
4454 Crabapple Ct
Tracy, CA 95377
Tel: (925) 487-4640
E-Mail: pe...@goglobalcompliance.com
--- On Thu, 2/11/10, sudhakar wasnik <saloni95...@yahoo.com> wrote:
From: sudhakar wasnik <saloni95...@yahoo.com>
Subject: UL 1439 standard genesis
To: emc-p...@ieee.org
Date: Thursday, February 11, 2010, 1:49 PM
Hi Guys,
Can some one in the group shade some light on origin of this UL 1439 sharp
edge standard?
Does this standard have any basic standard like ANSI or any other on which
this standard has evolved or is this evolution was by itself?
Thanks,
Sudhakar Wasnik,
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc
discussion list. To post a message to the list, send your e-mail to
<emc-p...@ieee.org>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
<http://www.ieeecommunities.org/emc-pstc>
Graphics (in well-used formats), large files, etc. can be posted to
that URL.
Website: http://www.ieee-pses.org/ <http://www.ieee-pses.org/>
Instructions: http://listserv.ieee.org/request/user-guide.html
<http://listserv.ieee.org/request/user-guide.html>
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org>
David Heald <dhe...@gmail.com>
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society
emc-pstc
discussion list. To post a message to the list, send your e-mail to
<emc-p...@ieee.org>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
<http://www.ieeecommunities.org/emc-pstc>
Graphics (in well-used formats), large files, etc. can be posted to
that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org>
David Heald <dhe...@gmail.com>
________________________________
Disclaimer - This email and any files transmitted with it are
confidential
and contain privileged or copyrighted information. You must not present this
message to another party without first gaining permission from the sender. If
you are not the intended recipient, you must not copy, print, distribute or
use this email or the information contained in it for any purpose other than
to notify us.
If you received this email in error, please notify the sender
immediately and
delete this email from your system. We do not guarantee that this email is
free from viruses or any other defects although due care has been taken to
minimize the risk.
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<emc-p...@ieee.org>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org>
David Heald <dhe...@gmail.com>
