Penultimate
Member
Greetings
This one took me a long time, a lot of design, redesign, and prototyping to make my first bulk filler.
A bulk filler works like a syringe filler except the plunge rod is stored in the reservoir instead of the in the body behind the reservoir. A bulk filler holds a lot more ink than a syringe filler, but design is more complicated than the syringe filler. The plunger must be connected to the plunger to fill the reservoir then disconnected to send the rod into the reservoir for storage. Also, depending on the design, a method to secure the plunger at the top so the rod may be disengaged is necessary
After about five prototypes I arrived at the current design. The plunger has two external o-rings to seal the body ID and one small o-ring to seal the plunge rod. A 6-32 internal thread connects to the plunge rod so the plunge can slide down then up to fill the pen. The 2mm diameter plunge rod has an Aluminum screw with 6-32 external threads and M2x0.4 internal thread. The part that seals the top of the pen is threaded into the body and has bore for felt packing material.
To fill the pen, the body finial is unscrewed and pulled up toward the plunger that is mated to the top sealing part. The set screw on the rod is threaded into the plunger. Press the plunger down then pull up to fill the pen. When the plunger is engaged with the top seal unscrew the plunge rod and press down. A couple drops of ink will come out. screw down the finial and you are finished.
I have to refine my design, the cap to body ratio is off. had a little cap mishap that's why it is a little short. If I switch to an 8-32 thread for the plunger rod thread I can use a set screw instead of making such a small part.Still working on my wire bending skills.
The pen has a #5 fine Jinhao nib with a modified thread to fit in the section. It's a little scratchy, so it needs polishing and tuning.
I used vintage patents for a lot of my information and inspiration. AI is very helpful finding patents.There is a web site that lists all old fountain patents. I have to find the link.
Hop over to the Kitless forum, I'll post pics of the components. It might make more sense.
The solid color blank has a lot of purple in it and shimmers. It's been so long, I can't remember the name.
Thanks for lookin'.
Mike
This one took me a long time, a lot of design, redesign, and prototyping to make my first bulk filler.
A bulk filler works like a syringe filler except the plunge rod is stored in the reservoir instead of the in the body behind the reservoir. A bulk filler holds a lot more ink than a syringe filler, but design is more complicated than the syringe filler. The plunger must be connected to the plunger to fill the reservoir then disconnected to send the rod into the reservoir for storage. Also, depending on the design, a method to secure the plunger at the top so the rod may be disengaged is necessary
After about five prototypes I arrived at the current design. The plunger has two external o-rings to seal the body ID and one small o-ring to seal the plunge rod. A 6-32 internal thread connects to the plunge rod so the plunge can slide down then up to fill the pen. The 2mm diameter plunge rod has an Aluminum screw with 6-32 external threads and M2x0.4 internal thread. The part that seals the top of the pen is threaded into the body and has bore for felt packing material.
To fill the pen, the body finial is unscrewed and pulled up toward the plunger that is mated to the top sealing part. The set screw on the rod is threaded into the plunger. Press the plunger down then pull up to fill the pen. When the plunger is engaged with the top seal unscrew the plunge rod and press down. A couple drops of ink will come out. screw down the finial and you are finished.
I have to refine my design, the cap to body ratio is off. had a little cap mishap that's why it is a little short. If I switch to an 8-32 thread for the plunger rod thread I can use a set screw instead of making such a small part.Still working on my wire bending skills.
The pen has a #5 fine Jinhao nib with a modified thread to fit in the section. It's a little scratchy, so it needs polishing and tuning.
I used vintage patents for a lot of my information and inspiration. AI is very helpful finding patents.There is a web site that lists all old fountain patents. I have to find the link.
Hop over to the Kitless forum, I'll post pics of the components. It might make more sense.
The solid color blank has a lot of purple in it and shimmers. It's been so long, I can't remember the name.
Thanks for lookin'.
Mike
