Wality Airmail 69Eb.

[vijaych]

4 minutes ago, hari317 said:

Genius work by Prabhakar sir. You know the 69EB offers multistart threads. Only Kim and co and nowadays Ranga offers this in ebonite in India.

 I inked up click bamboo sir,  in few days I will share the result whether leakage of ink from barrel stopped or not sir

[K Singh]

5 hours ago, hari317 said:

Genius work by Prabhakar sir. You know the 69EB offers multistart threads. Only Kim and co and nowadays Ranga offers this in ebonite in India. 

Sir, is there any advantage of having multistart threads when pens can be made to uncap under 1-2 turns by traditional methods as well.

[hari317]

5 hours ago, K Singh said:

Sir, is there any advantage of having multistart threads when pens can be made to uncap under 1-2 turns by traditional methods as well.

Yea. When a pen maker gives one turn opening using a single start thread, the entire cap hangs literally hangs by that one thread cut in ebonite. It will  prematurely fail. That’s bad engineering. That’s why traditional pen makers give 3 to 5 turns  each turn is a thread. So more strength.
On a multi start thread there are more threads taking the load still allowing one turn cap off. so number of threads engaged is no of turns to uncap x no of starts. It’s the right engineering solution. 

[K Singh]

10 hours ago, hari317 said:

Yea. When a pen maker gives one turn opening using a single start thread, the entire cap hangs literally hangs by that one thread cut in ebonite. It will  prematurely fail. That’s bad engineering. That’s why traditional pen makers give 3 to 5 turns  each turn is a thread. So more strength.
On a multi start thread there are more threads taking the load still allowing one turn cap off. so number of threads engaged is no of turns to uncap x no of starts. It’s the right engineering solution. 

Thank you so much for explaining this in such a simple way 🙏 It all makes perfect sense now.