2 Jan
2006
2 Jan
'06
9:12 a.m.
From: "William Maddox" <wmaddox at
pacbell.net>
Dwight Elvey wrote:
Hi Bill
Using the mylar from the balloons seems like the best of ideas.
It is very thin and would most likely work the best.
One could get a hole punch from an auto parts store ( used
for making gaskets ) and make new pads. I have closed cell
foam that is over 20 years old and still fine, unlike the
normal foam used elsewhere that ozone and time have turned
to a gooey mess.
I would say that this makes the keyboards repairable for
someone that want to take the time.
Dwight
Hi
Some types of foam don't last long. I wonder if one
could make some with closed cell foam instead. It
last much longer but is a little stiffer than the
foam that they seem to be using.
If it is a capacitive you should be able to make
new capacitors with some aluminum foil and clear
tape.
Aluminized mylar is easy to come by in the form of mylar punched-tape
stock. It is quite expensive these days, but a single roll would go a
long way. Also, aluminized mylar is widely used in balloons and novelty
items, which could be harvested for material. I have no idea if the
thickness is critical, but this sort of material would likely be much
more conformant than aluminum foil.
--Bill 
2 Jan
2 Jan
9:51 a.m.
I wonder if one could take a thin stiff plastic (perhaps for
overhead transparencies?), glue it to the foam, and glue that to the
mylar, then start punching discs. I don't know about the gasket cutter,
but I have a tool from years ago that was part of a grommetting kit.
It's a sharp edged steel tool for cutting holes in canvas or rubber, and
is smacked with a hammer to do the cutting.
You'd need an adhesive that wasn't thick and wouldn't eat the foam.
Perhaps something like "artists adhesive". I think it's used for
mounting photos and such, and comes in a spray can. I do remember it's
fairly thin. I don't know if it would remain sticky enough over time.
--jc
Dwight Elvey wrote:
Hi Bill
Using the mylar from the balloons seems like the best of ideas.
It is very thin and would most likely work the best.
One could get a hole punch from an auto parts store ( used
for making gaskets ) and make new pads. I have closed cell
foam that is over 20 years old and still fine, unlike the
normal foam used elsewhere that ozone and time have turned
to a gooey mess.
I would say that this makes the keyboards repairable for
someone that want to take the time.
Dwight
12:12 p.m.
On 1/2/2006 at 12:51 PM J.C. Wren wrote:
You'd need an adhesive that wasn't thick
and wouldn't eat the foam.
Perhaps something like "artists adhesive". I think it's used for
mounting photos and such, and comes in a spray can. I do remember it's
fairly thin. I don't know if it would remain sticky enough over time.
It might be too thick, but the self-adhesive tinted mylar film sold for
windows might be conductive enough and have a suitable adhesive.
2:39 p.m.
Chuck Guzis wrote:
On 1/2/2006 at 12:51 PM J.C. Wren wrote:
Does the foil disk need to be smaller than the plastic?
If not, you could just use one hole-punch on a sandwich of aluminium
foil and clear boxing tape. Most hobbyest stores with scrapbook
supplies should have round punches in assorted sizes.
You'd need an adhesive that wasn't
thick and wouldn't eat the foam.
Perhaps something like "artists adhesive". I think it's used for
mounting photos and such, and comes in a spray can. I do remember it's
fairly thin. I don't know if it would remain sticky enough over time.
It might be too thick, but the self-adhesive tinted mylar film sold for
windows might be conductive enough and have a suitable adhesive.
6929
days inactive
6929
days old
3 comments
4 participants
participants (4)
-
cclist＠sydex.com -
dwight.elvey＠amd.com -
jcwren＠jcwren.com -
kth＠srv.net