How do they paint the stripes on resistors, bumble bee caps,

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

 

[Rheilly Phoull]

On 9/09/2017 10:11 AM, oldschool@tubes.com wrote:

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

They get the christmas elves in the off season to paint them on with
their toy decorating brushes.

 

[Mike Coon]

In article <05j6rcd2vbktmb6r28k8cj2m01gguob6p5@4ax.com>,
oldschool@tubes.com says...

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

No, but after an hour or so hunting through my father's random box of
hundreds of resistors looking for the value I wanted, I got a powerful
urge to take any old one and paint on the right colours... (Never did,
though!)

Mike.

 

[John-Del]

On Friday, September 8, 2017 at 11:12:02 PM UTC-4, olds...@tubes.com wrote:

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

We could tell you, but then we'd have to kill you. Legal mumbo jumbo out of the way, would you like me to explain it to you?

 

[Michael A. Terrell]

oldschool@tubes.com wrote:

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

Isn't it obvious? Early resistors were hand painted, then they
developed machines for the job.



--
Never piss off an Engineer!

They don't get mad.

They don't get even.

They go for over unity! ;-)

 

[Taxed and Spent]

On 9/9/2017 5:21 AM, Michael A. Terrell wrote:

oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

Isn't it obvious? Early resistors were hand painted, then they
developed machines for the job.

how did they paint the machines?

 

[Jeff Liebermann]

On Fri, 08 Sep 2017 22:11:09 -0400, oldschool@tubes.com wrote:

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

I suspect you could guess how it's done without any assistance.

My guess(tm) is that the resistors are hand painted in Japan as a
spare time project for highly skilled porcelain painters. Whey they
get bored, we get resistors like this:
<https://img0.etsystatic.com/174/0/8168616/il_340x270.1181159266_6pfz.jpg>
<https://www.etsy.com/market/resistor_jewelry>
<https://www.pinterest.com/search/pins/?q=resistor jewelry>

>Has anyone ever heard anything about this process?

Nope. I couldn't find anything under "axial resistor marking
machine", "axial resistor color code marking device", or something
similar. Nothing under patents. Oddly, the color code itself doesn't
seem to be patented. The marking method is probably part of a highly
automated manufacturing process and either a well protected trade
circuit, or so trivial that nobody has bothered to make a dedicated
resistor marking machine. I'll add it to my list of unexplained
electronic phenomenon.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Phil Hobbs]

On 09/09/2017 08:21 AM, Michael A. Terrell wrote:

oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

   Isn't it obvious? Early resistors were hand painted, then they
developed machines for the job.

Angelfish caps (Mullard) were dipped in paint to different depths to
form the stripes.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

 

[Sjouke Burry]

On 9-9-2017 14:35, Taxed and Spent wrote:

On 9/9/2017 5:21 AM, Michael A. Terrell wrote:
oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

Isn't it obvious? Early resistors were hand painted, then they
developed machines for the job.





how did they paint the machines?

Carefully.

 

On Sat, 9 Sep 2017 08:21:13 -0400, "Michael A. Terrell"
<mike.terrell@earthlink.net> wrote:

oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

Isn't it obvious? Early resistors were hand painted, then they
developed machines for the job.

It's a no brainer they use a machine. My question goes much deeper. How
does the machine do it? Are the paints applied by a paint brush, or
something like a felt tip marker, or maybe some sort of spray method?
Once the correct colors are chosen for that batch of (whatever value),
how do they rotate them so the paint is not smeared. I can only assume
they are picked up by their leads, not the body, and somehow rotated by
their leads too.

I do believe the early resistors, especially those ceramic types that
had colored dots on them, were probably hand painted. I have also noted
that the old bumble bee caps often had irregular stripes, where the
paint was thicker in spots, thinner in others, and the edges were not
always precise.

There is a series on tv, which is usually only shown on Saturday
mornings, during the kids shows, that show how an item is made. The ones
I remember are making candy, and making lightbulbs (incandescent). They
show the entire process, start to finish, and show each step both in the
machines and how workers are involved. I cant recall the name of them
programs, and have not seen any in a long time, but they are quite
interesting. That lightbulb one was extremely interesting. Each bulb is
tested in a machine and workers watch ot make sure they light up. Seeing
this, (on tv or youtube), for resistors would be interesting. Too bad
they dont have more stuff like that on tv, rather than the usual garbage
that is mostly on the channels these days.

One thing I do know, is that most small electronic parts with wire
leads, leave the factory in the form of ladders. Meaning that 100 or
1000, or any other number of them are one long strip being held together
by 2 strips of paper around the leads, to form what looks like a ladder.

So, if you worked at Zenith assembling radios, there would be rolls of
those ladders for every value of resistor, capacitor, etc, needed, at
each work station.

By the way, there is a good documentary video on youtube that shows
radios being made at Zenith. It was filmed in (If I recall correctly),
the 1950s. Worth watching!

 

On Saturday, 9 September 2017 20:15:39 UTC+1, olds...@tubes.com wrote:

On Sat, 9 Sep 2017 08:21:13 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:
oldschool@tubes.com wrote:

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

Isn't it obvious? Early resistors were hand painted, then they
developed machines for the job.

It's a no brainer they use a machine. My question goes much deeper. How
does the machine do it? Are the paints applied by a paint brush, or
something like a felt tip marker, or maybe some sort of spray method?

You really think a spray would be a good match for this app?

Once the correct colors are chosen for that batch of (whatever value),
how do they rotate them

seriously?

so the paint is not smeared. I can only assume
they are picked up by their leads, not the body, and somehow rotated by
their leads too.

good luck in life.

 

[pfjw@aol.com]

We live in a world that can print an M on a small candy, print tens of thousands of devices on a bit of epoxy, and make geared watches with gears (wheels) with pitches measured in microns - and has been doing this in the case of watches for nearly 200 years, and in the case of electronics for well over 60 years. Then, consider the printing technology required for paper money.

So, printing stripes and other markings on devices the size of even an 1/8-watt resistors would be a simple issue.

I would posit a rotating intaglio printer as a relatively simple device with very prices application ability and little slop. And although the print heads would wear, they would have very nearly infinite life as compared to a brush or roller. This is the purest speculation, of course.

Peter Wieck
Melrose Park, PA

 

[Cursitor Doom]

On Sat, 09 Sep 2017 14:53:50 -0700, pfjw@aol.com wrote:

I would posit a rotating intaglio printer as a relatively simple device
with very prices application ability and little slop. And although the
print heads would wear, they would have very nearly infinite life as
compared to a brush or roller.

Intaglio requires very heavy pressures of around 80T/square inch
generated by *very* heavy machinery; much, much heavier than litho or
letterpress which are like balsa toys by comparison. Then you have to
have the right plates. Engraving those plates to an acceptable standard
requires very *considerable* expertise by people who can command pay
grades that elevate them *way* above every other 'manual' worker into a
league of their own.

This is the purest speculation, of
course.

It certainly is. You are right about the simplicity of the machinery,
though.


--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.

 

[Roger Blake]

On 2017-09-09, oldschool@tubes.com <oldschool@tubes.com> wrote:

I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

I remember when computers used core memory the manufacturers employed
oriental women to string the cores because of their small, nimble hands.
This may be much the same kind of thing.

--
-----------------------------------------------------------------------------
Roger Blake (Posts from Google Groups killfiled due to excess spam.)

NSA sedition and treason -- http://www.DeathToNSAthugs.com
Don't talk to cops! -- http://www.DontTalkToCops.com
Badges don't grant extra rights -- http://www.CopBlock.org
-----------------------------------------------------------------------------

 

[pfjw@aol.com]

On Saturday, September 9, 2017 at 7:19:46 PM UTC-4, Cursitor Doom wrote:

Intaglio requires very heavy pressures of around 80T/square inch
generated by *very* heavy machinery; much, much heavier than litho or
letterpress which are like balsa toys by comparison. Then you have to
have the right plates. Engraving those plates to an acceptable standard
requires very *considerable* expertise by people who can command pay
grades that elevate them *way* above every other 'manual' worker into a
league of their own.

It does when printing on paper. However, not when printing on solid materials such as glass bottles as a primary example. That requires a fast-cure (usually heat), high-tack ink, and quite light pressure given the speeds involved. Consider the typical direct-printed beer-bottle.

Peter Wieck
Melrose Park, PA

 

[Taxed and Spent]

On 9/9/2017 4:47 PM, Roger Blake wrote:

On 2017-09-09, oldschool@tubes.com <oldschool@tubes.com> wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?

I remember when computers used core memory the manufacturers employed
oriental women to string the cores because of their small, nimble hands.
This may be much the same kind of thing.

Not any more. They now have to use a proportional share of big, hairy,
burly men. They throw those misprinted resistors out. Haven't you
noticed the price increases?

 

[Jeff Liebermann]

On Sat, 9 Sep 2017 14:53:50 -0700 (PDT), "pfjw@aol.com" <pfjw@aol.com>
wrote:

I would posit a rotating intaglio printer as a relatively
simple device with very prices application ability and
little slop. And although the print heads would wear,
they would have very nearly infinite life as compared
to a brush or roller. This is the purest speculation,
of course.

May I humbly suggest you reconsider your speculation. Intaglio is
slow. It works well for flat objects but not so well with irregular
diameters, such as metal film resistors:
<https://www.google.com/search?q=film+resistor&tbm=isch>
Notice the irregular diameter and inconsistent bulges at the ends
cause by dipping and turning the resistor (before marking) in some
kind of insulating coating before firing. Dealing with these
inconsistencies and irregularities probably eliminates any form of ink
tranfer that involved physical contract with the resistor body such as
roller, brushes, stamping, etc. My guess(tm) is some kind of ink jet
or spray marker applied while spinning the resistor around its center
line. I haven't found any machinery yet that claims to do this.


--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

On Sat, 9 Sep 2017 12:45:58 +0800, Rheilly Phoull
<rheilly@bigslong.com> wrote:

On 9/09/2017 10:11 AM, oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?


They get the christmas elves in the off season to paint them on with
their toy decorating brushes.

That's not true. There are no such things as elves. Only faries.
ERS

 

[Tom Biasi]

On 9/10/2017 4:19 PM, etpm@whidbey.com wrote:

On Sat, 9 Sep 2017 12:45:58 +0800, Rheilly Phoull
rheilly@bigslong.com> wrote:

On 9/09/2017 10:11 AM, oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?


They get the christmas elves in the off season to paint them on with
their toy decorating brushes.
That's not true. There are no such things as elves. Only faries.
ERS

Then who the hell makes the cookies?

 

On Sun, 10 Sep 2017 20:19:43 -0400, Tom Biasi <tombiasi@optonline.net>
wrote:

On 9/10/2017 4:19 PM, etpm@whidbey.com wrote:
On Sat, 9 Sep 2017 12:45:58 +0800, Rheilly Phoull
rheilly@bigslong.com> wrote:

On 9/09/2017 10:11 AM, oldschool@tubes.com wrote:
I've always wondered how they paint on the colored stripes. I put "how
do they paint the stripes on resistors" on google, but all I got was
links explaining how to READ color codes.

Has anyone ever heard anything about this process?


They get the christmas elves in the off season to paint them on with
their toy decorating brushes.
That's not true. There are no such things as elves. Only faries.
ERS

Then who the hell makes the cookies?

Trolls make the cookies, but only the "Troll House" brand.