twsbi vacuum filling system fountain pen project

[jonro]

I wish you would move away from mixed smooth/faceted designs. Perhaps you could stick with smooth everything for now. Sometimes simple is better. I'm not saying that I don't like faceted pens. Usually I prefer smooth pens, but mixing the two just doesn't do it for me at all. I would like to see a smooth pull cap. If not that, a bayonet mount (i.e., Visconti) or a magnetic latch would be very cool. If you do end up using a screw thread, please make it a finer threading than that of the Diamond 530, which is a bit abrasive. I'm looking forward to the next pen in your line.

[dizzypen]

I really like the facets, but I agree that mixing smooth and faceted is not very appealing. I'd like to see a faceted cap and piston nob to go with the faceted barrels.

[stevlight]

Make the cap POST securely and with out making the pen TOO long.

 

The piston filler while I love it is a little unbalanced when posted.

[etoyoc]

Make the cap POST securely and with out making the pen TOO long.

 

The piston filler while I love it is a little unbalanced when posted.

 

 

I thought so at first as well. However, now I don't notice it as much as I am writing.

[riff raff]

Make the cap POST securely and with out making the pen TOO long.

 

The piston filler while I love it is a little unbalanced when posted.

I thought so at first as well. However, now I don't notice it as much as I am writing.

While I don't post my pens, playing with the 530 I noticed that if I do post it, and twist the cap the wrong way when removing it, it could push some ink out the feed.

[sotto2]

I like the facets on the cap, but not on the other end. Should be smooth taper. More tasteful and less septor-like.

 

thanks!

[Mickey]

I have only one cheap demonstrator with spring loaded cap, and the ink always splatters on the inner cap when I cap or uncap the pen. Is this likely to happen for the vacuum fill pen? If so, I'll prefer a twist cap. In my limited experience, the twist cap also prevents ink from drying out better than the spring loaded cap.

 

Looking to the pics, the cap seems to be a twist one.

 

I assumed Speedy was referring to the design of the CLIP.

 

I thought the same as well, and yes, a twist cap, please. The clip looks better in the green demo, or is it me? A more refined one would be an improvement, but the general looks of the pen are fine. As someone that has followed the original thread for months, let me congratulate you for the effort and knowledge of making an affordable piston filler. Will the nibs have several options (from Xf to BB plus italics?).

 

Among my pens is a Platinum Preppy, which has an innovative spring loaded inner cap. I have never had any ink splatter in this pen and it's clear plastic, so I would know if it did. I think we need more pens with pull caps, especially with modern technology. The pull cap worked well for the Parker 51 and Sheaffer PFM.

In this pen, the spring loading is for clip function; it is a diecasting clip, not steel stamped clip. a well designed inner cap can provide good sealing of the pen, not leaking out.

 

I've noticed that in many demonstrator pens a spring loaded cap snaps shut so violently that it causes the pen to spit ink. I'd imagine this is why demonstrators so often have screw fit caps.

 

But screw fit caps take longer to get off. Not that long, but long enough to count if all you want to do is to do is to jot down a telephone number.

 

So how about solving this problem by replacing the screw thread with a spring bayonet lock rather like a push fit light bulb?

 

This would be quicker to get on and off than a screw thread. But because it would be necessary to twist the cap to close the bayonet lock, it would prevent the sharp snap that causes pens to spit ink.

 

The bayonet lock could be operated purely by using the springiness of the plastic itself or, as there is already a spring loaded device in the cap, this could be designed to provide the springiness to lock the cap. As the pen is made of a relatively brittle plastic, the second of the two options might prevent cracks in the plastic.

 

Please make sure the inner cap can be extracted to clean ink trapped between the two caps.

+1

 

Checl out the design of the "cap retention mechanism" of the Visconti in this thread.

 

You could ameliorate or eliminate the tactile problem for people who grip the pen high (without borrowing a potentially patented solution) simply by making the barrel threads female and setting the pitch so that the lands are two or more times wider than the grooves.

[Vincent1278]

I'm glad to see a pen that isn't designed for posting. As for the faceted look, I think it makes the diamond model a diamond model.

 

Can't wait to be able to buy one of these. The 530 is a great pen and I love using it so far.

[penfanatic321]

I like the design, any word on a release date for this pen?

 

Also does anyone know of any other manufactures making vacuum filling pens?

[Pen Is Mightier]

I like the design, any word on a release date for this pen?

 

Also does anyone know of any other manufactures making vacuum filling pens?

Pilot is the only other pen maker I can recall making vacuum fillers right now, for instance their Pilot Custom 823 which I have been ogling on the internet for a long while.

Edit: Forgot to add custom between Pilot and 823

Edited August 6, 2010 by Pen Is Mightier

[penfanatic321]

I like the design, any word on a release date for this pen?

 

Also does anyone know of any other manufactures making vacuum filling pens?

Pilot is the only other pen maker I can recall making vacuum fillers right now, for instance their Pilot Custom 823 which I have been ogling on the internet for a long while.

Edit: Forgot to add custom between Pilot and 823

 

Thanks for the info, I caved and got a Pilot Custom 823 from Japan.

Its a fantastic pen, so smooth and precise to write with and the ink capacity is huge!

[tonybelding]

Pilot is the only other pen maker I can recall making vacuum fillers right now, for instance their Pilot Custom 823 which I have been ogling on the internet for a long while.

 

Visconti! They use their "power filler" on the Opera Master, Wall Street LE, Homo sapiens. . . and possibly others, I don't remember.

 

EDIT: I almost forgot that Stipula make some too. The "Suprema Nuda" demonstrator is a plunger-filler, and they might have some others.

Edited August 19, 2010 by tonybelding

[millerb7]

Oh man, first time seeing this thread, and after my diamond 530, I'm ecstatic to get one whenever they are out... any further update since June?

[zdeveric]

Hi Speedy,

 

Great design, but the qustion is when PP007 will be available on the market?

 

Zoran

 

 

[jniforat]

Hi Speedy,

 

Great design, but the qustion is when PP007 will be available on the market?

 

Zoran

 

+1 can't wait to get my hand on one

[killercode]

the trasparent green pen rendering is fantastic

Edited August 19, 2010 by killercode

[sygyzy]

I assume this is a screw cap. I am not trying to be super nitpicky but I noticed on my Diamond 530, when you screw on the cap, the the orientation of the nib does not line up. I think it would take 5 minutes of time for the manufacturing division to adjust their tool/machine to thread the cap/body so they match up. These are the kinds of attention to detail that I notice on a pen and I think it would cost you almost nothing to accomplish. To clarify, I want the front face of the nib to be directly under the clip when I have it capped.

[Ernst Bitterman]

I think it would take 5 minutes of time for the manufacturing division to adjust their tool/machine to thread the cap/body so they match up.

 

I know you're not trying to achieve it, but that is an enormous level of nitpickery. It would require having a thread with a single channel, which to seat as firmly on the pen would take many, many twists-- Waterman manages to get the Phileas point to line up with the "shin-guard", but you don't have to undo the section every time you want to write. Without this, you've got as many possible facings of the point as there are channels in the thread. It would also take some kind of registration point on the feed and section to make sure they're in alignment, which would be pretty low key, but would also introduce a little more time in both machining and assembly, which would run counter to the apparent TWSBI goal of keeping the pen within range of the common man's purse.

[Lloyd]

I believe the Diamond nib is designed to be perpendicular to the clip when capped to allow viewing it when capped.

[speedy]

I believe the Diamond nib is designed to be perpendicular to the clip when capped to allow viewing it when capped.

 

Our parts are, but the feeder holders thread are not, so.