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Modified Converter For Use In Kaweco Sport


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42 replies to this topic

#21 Daisy

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Posted 14 November 2012 - 19:34

Well, I kinda took a sudden left turn, and based on the positive report contained in this thread, just now bought a set of these off the Bay. Their main drawback is that they hold very, very little ink -- which to me is kind of bonus -- and if they fit the feed nipple of the Sport, I'm in business.

I may still try that sac/cartridge thing, though. I have the technology. :D




P.S. Found these too, from information contained in this thread, but as I already ordered the squeeze type I'll hold off on trying one, though they look very cool. :D


(edited to add P.S.)

Edited by Daisy, 14 November 2012 - 20:00.

Not really a scribe, more of a Pharisee...



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#22 Daisy

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Posted 14 November 2012 - 19:38

Fun thread! I love this kind of tinkering.

Hey Flounder! I do too!!! :D

If the barrel is chambered so narrow as to be a spoilsport, could the nipple end be shellaced over a long, thin sac, rather than the other way around?


You mean shellac the outside of the cut end of the sac to the inside of the cut end of the cartridge? Sure, as long as you could temporarily turn the closed end of the sac inside itself up into the cartridge to be able to press on the seam for good adherence, which one could do with just a toothpick... or so it seems to me. :D

Wow, what a good idea!!!

Edited by Daisy, 14 November 2012 - 19:40.

Not really a scribe, more of a Pharisee...



"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
-- Fourth Amendment to the U.S. Constitution


#23 dcpritch

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Posted 14 November 2012 - 21:52

UPDATE: now working!

I cut the cartridge so that, when fully inserted into the section, less than 1/4" was revealed (actually, about 6.5mm, by my rough measurement). Just enough to use for attaching a No. 18 sac, which I did. But first I sanded down the cut end of the cartridge as Daisy had suggested and it worked. The total sac length is 40mm, and it could have been about 15mm longer if you want it to bump up against the back of the barrel, but I don't think that's a good idea. After the shellac dried I inserted the device into the section and screwed on the barrel - no sticking as before. Then I filled it with PR Spearmint - man, it holds a ton of ink! Almost as much as an Estie - and it is now in my current rotation.

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I posted these pics on another thread but thought I'd show them here as well.

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#24 tenney

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Posted 14 November 2012 - 23:03

Thank you for this topic... lots of interesting information and ideas to absorb.
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Glenn (love those pen posses)

#25 jacksterp

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Posted 15 November 2012 - 00:00

Very good work.

I was just wondering what is the proper method of filling something like this?

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#26 Flounder

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Posted 15 November 2012 - 00:05

Glad it worked out :thumbup: Blimey that is a close fit!

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#27 Daisy

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Posted 15 November 2012 - 00:15

UPDATE: now working!


Sweet!!! Looks good, too! :thumbup:

Not really a scribe, more of a Pharisee...



"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
-- Fourth Amendment to the U.S. Constitution


#28 Daisy

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Posted 15 November 2012 - 00:20

I was just wondering what is the proper method of filling something like this?


From the way it looks, he's got more than enough sac on there to operate it as a regular squeeze converter: unscrew the barrel, and with the nib immersed in ink, squish the air out of the sac with your fingers, allowing the resulting vacuum to draw ink into the sac.

If that's not actually the case, I trust he'll tell us. But it doesn't look like he had any problem getting a gracious plenty of ink up in there. :D

Not really a scribe, more of a Pharisee...



"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."
-- Fourth Amendment to the U.S. Constitution


#29 jacksterp

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Posted 15 November 2012 - 00:46

Daisy - thank you for the explanation. I wasn't sure of the length of the modification.

Thought perhaps you needed to partially roll it.

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#30 OcalaFlGuy

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Posted 08 December 2012 - 18:10

I just did DCP's little conversion this morning and I was actually watching the clock for the hour to pass the shellac was drying. :vbg:

It seems to work just fine. I'm not real sure of the quantity of ink it takes in (vs the original micro cart) but it IS taking it in the "right" way thru the nib and is super easy and quick to refill.

Thanks for the inspiration David! :thumbup:

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#31 dcpritch

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Posted 10 December 2012 - 17:06

Daisy - thank you for the explanation. I wasn't sure of the length of the modification.

Thought perhaps you needed to partially roll it.


Jacksterp, I'm sorry not to have answered your previous question. The sac length is 4cm total, including the part glued to the neck. I think it could go a little longer, for a total length of 4.5cm - any longer and the sac would start getting into the grooves at the barrel end. And Daisy is right, you fill it by putting the nib into ink and squeezing the sac, similar to a bulb filler, then screw the section back into the barrel and you are up and running.


I just did DCP's little conversion this morning and I was actually watching the clock for the hour to pass the shellac was drying. :vbg:

It seems to work just fine. I'm not real sure of the quantity of ink it takes in (vs the original micro cart) but it IS taking it in the "right" way thru the nib and is super easy and quick to refill.

Thanks for the inspiration David! :thumbup:


Hey Bruce, I'm glad it worked. I think the flow of ink from this homemade contraption is far better than from a cartridge. Plus it was easy and kinda fun to do.

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#32 seffrican

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Posted 10 December 2012 - 18:15

By coincidence, since this thread has popped up again, I was trying to trim one of those Monteverde micro converters to fit my Sport. The problem is that the nipple is too long, so it doesn't seat properly. It will connect, which is why people think it works, but a slight jar towards the rear of the pen will unseat the converter.

I have a pile of spare converters that look as if they may pay the role of the Baoer converter described at the start of the thread. Does anyone have a photo of what the original Baoer converter looked like before it was dismantled? That would be helpful.
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#33 TheGreatRoe

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Posted 17 January 2013 - 02:08

I can't fine the exact post now, but somewhere in this thread it was said that when making the squeeze converter, it was optional as to whether to keep the little agitator ball in the completed converter, but that the builder chose to toss the ball out.

During my first attempt I discovered that the ball is not optional...it should NOT be included. If you included the agitator ball, when you try to expel liquid from the rubber bulb, like when you're cleaning the sac by squeezing water in and out, if the ball lodges in the mouth of the cartridge the increasing pressure can blow out the shellac seam.

For my second and third attempts I left out the ball, and didn't have any problems.

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#34 dcpritch

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Posted 17 January 2013 - 05:41

... For my second and third attempts I left out the ball, and didn't have any problems.


Great advise. That little ball works well in carts but has no real use in the modified squeeze filler we've been making. I sure appreciate all the shared wisdom on FPN.

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#35 Earthdawn

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Posted 17 January 2013 - 07:13

What a cool thread... I just went over to http://www.pendemonium.com and ordered a few sacs and some Orange Shellac to give this a try.

I can't wait to mess around with this.

Thanks for all the info and pics :thumbup:

#36 Earthdawn

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Posted 20 January 2013 - 10:03

UPDATE: now working!

I cut the cartridge so that, when fully inserted into the section, less than 1/4" was revealed (actually, about 6.5mm, by my rough measurement). Just enough to use for attaching a No. 18 sac, which I did. But first I sanded down the cut end of the cartridge as Daisy had suggested and it worked. The total sac length is 40mm, and it could have been about 15mm longer if you want it to bump up against the back of the barrel, but I don't think that's a good idea. After the shellac dried I inserted the device into the section and screwed on the barrel - no sticking as before. Then I filled it with PR Spearmint - man, it holds a ton of ink! Almost as much as an Estie - and it is now in my current rotation.


Brilliant !!!

I just got my sac and shallac in today and went to work. This was so easy and worked 100%. The pen writes a little wetter which I like and should certainly be holding a LOT more ink as well.

Thank you so much :thumbup:

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#37 Inkwellpens

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Posted 11 February 2013 - 21:40

This is great, I will order some parts and give it a go. Does the sac go on the outside of the cut cartridge? Or the inside?
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#38 TheGreatRoe

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Posted 11 February 2013 - 22:20

This is great, I will order some parts and give it a go. Does the sac go on the outside of the cut cartridge? Or the inside?


It would be obvious once you have the pieces in your hand, but the sac goes on the outside.

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#39 sargetalon

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Posted 12 February 2013 - 00:19

This thread is excellent and what a coincidence. Just the info I was looking for today. Just got a new Kaweco Sport but the Montverde Mini Converter I bought wasn't even trying to fit. I will have the give the modified sac a go.

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#40 seffrican

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Posted 14 March 2013 - 16:47

To update this thread with something that may interest those of you who want something like this, I learned about the existence of this item today:

Kaweco Sport Converter

(No connection to FontoPlumo at all.)

Of course, this turns up a week after I actually cut down a slide converter to fit in my Sport Classic Clear...!
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