Hi, I am working on cleaning and functionally refurbishing a British built Vandercook No. 4C. The press is complete and seems to be in pretty good shape – it mainly needs some cleaning work. While cleaning the cylinder racks I noticed a feature that I didn’t see on cylinder proof presses before: The cylinder racks on both sides of the press are split in two parts (Well, this is not new to me…). The back part is fixed. But the front part (towards the bed end) are moveable with a spring. (See Video)
Now I didn’t really find out why they are moveable? Isn’t that a problem for cylinder smudge while printing? I noticed that they are moving easily when tripping the cylinder. I found out that they are almost not moving when in “print”… (I haven been printing on this press yet, I am just in the process of cleaning it…)
Can anybody explain the exact function of these moveable racks?
Thank you very much.
See the attached Video: Vandercook-4C