The patent records show a number of designs for daylight-loading developing tanks that never, as far as I am aware, made it to the manufacturing stage. Here is one, a US patent granted in 1950*:

Screen Shot 2014-01-09 at 16.34.45

Reading this, I see it as a vertical Rondinax 60 for roll film. There is a mechanism to separate the film from the backing and another to draw it into the spiral. I am not sure what was sufficiently original in this design for the patent to be granted.

Here is one of the drawings:

Screen Shot 2014-01-09 at 16.44.32

Does anybody know if Mr Abraham Alk’s invention ever made it to the market?

It would appear he was also the inventor of a hand press. It seems likely that he is the Abraham Alk who was born in 1912 and died in 2001 at Fair Lawn, New Jersey.

http://bit.ly/1cFQhF8

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