Twdpens....has more experience than the rest of us combined with screwing out of Pelikan nib sections.
One problem...for one person....makes it foolish to condemn a pen that has been unscrewing nibs since 1929...as cheap and untrustworthy.
Sargetalon may be right that it was safely and more often done for nib change at the Corner Pen Store.
With help of corner pen stores....German...in Pelikan or MB had no real presence in America back when there were US corner pen stores also.
There are still local magazine and school kid shops where one can get a Safari or perhaps an Online pen...and ink. But no repair people behind the counter.
How ever, I think the old timers who were able to hand crank a car, after setting the spark, could twist out a nib with out much problem. They would have had lessons at the Corner Pen shop...had they a wish to have different nib widths...and were too poor to buy a pen for it....one forgets it was One Man, One Pen days.
Someone walking around with two pens would have had a hard time in Germany back then. Normality is often a stronger force than expected.
Even Colored pens were looked down on....or there would have been more...of those colorful made for Export pens found in Germany today.
With old 140-400's screw out nib and ebonite feeds, I always pad my forefinger with a paper towel.
Unscrewing, requires twisting the body towards your self. That helps with the fragile ebonite feeds. Keeping the feed still.
Same when I first open a modern plastic feed Pelikan. After that I, on the modern pens, just unscrew it...in I have used finger pressure to put them in.
Finger pressure by me, means I use only the thumb and forefinger to screw it back on with. I do not twist the barrel away from me.... I do not twist the barrel at all, in it's finger pressure only.
Not to a ''snug" fit...just a good fit.
The difference between easing to a stop or banging the wharf.
I do unscrew the nibs, in I'd never had a problem being careful not to use 'force'.
I think squirting out the barrel with either a rubber bulb or a needle syringe puts lots less stress on the works of the piston...which was made to fill a pen...and clean out a one ink pen every three months according to my instruction pamphlet from the '50s.
They did not change inks often....and to change ink takes many, many, many twistings of the plastic piston unit. That I think causes more wear and tear than the careful twisting out of the pen's nib and feed unit.
Best, least wearing of course is to turn back the clock....decide which single ink you are going to use with your Pelikan and clean it out every three months whether it needs it or not.
I will change my Pelikan nib units more than I do my Geha ones. I have Tortoise Pelikans that might enjoy a nicer nib. Or my 605 needs a real nib instead of that fat and blobby modern characterless one...so has a '54 semi-flex B................
My Geha 790's are black and gold outside one grey stripped body...and I do like the maxi-semi-flex OB that is on it just fine.
I carefully take out my nib section on either when cleaning them. I carefully fit and twist on the section when done....and others have over twisted their nib units in the past here on FPN....that I bore that in mind....to go slow....go easy...and don't crank it shut.
Edited by Bo Bo Olson, 13 December 2016 - 12:44.