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Topic: Cyan tracks - laser upgrades

Ray Derrick
Master Film Handler

Posts: 310
From: Sydney, Australia
Registered: Sep 2001

posted 02-18-2002 09:35 AM

So platters could be fitted with a yo-yo on the payout side as well as on the takeup. The yo-yo would normally be held fully extended unless the fail safe detected excessive tension (or slowing film movement) from the platter payout head, in which case it would release the yo-yo.

Could be expensive!

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Ray Derrick
President/Chief Engineer
Panalogic Corporation Sydney, Australia
Phone: 61 (0)2 9894 6655 Fax: 61 (0)2 9894 6935

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Frank Angel
Film God

Posts: 5305
From: Brooklyn NY USA
Registered: Dec 1999

posted 02-18-2002 10:58 AM

Yah, but guys, if these failsafe devices were installed on all platters, then we wouldn't have all those tasty stories about estar film pulling over projectors and platters. Sometimes I wonder what was going through the projectionist mind a the moment he heard a noise and turned around only to look down the lenght of the booth to actually see his projector tipping over.

Our booth is 5 stories above the orchestra floor. We have no elevator so the first thing I did was rig a wench in the hang cieling. It has a double hook that lowers to the orchestra floor below on aircraft cable. THe cans are attached to the hooks via the handles and then raised to the booth level and pulled through the large followspot window. Once as I raised a print (in TES's famous orange cans), one of the latches gave way, the can opened and as I watched from the window, I saw four reels of film fly out of the can, film unfurling down to the seats below. I recalls the one thought that went through my mind, right after "Holy s**t," was the almost beautiful ballet quality of the reels flying through the air and the 3D effect of them falling 5 stories. I imagine seeing a projector or a platter getting pulled over might evoke similar thoughts -- especially the "Holy S**t."

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John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 02-18-2002 12:50 PM

Kelmar had a "Chopper Plus" failsafe mechanism that cut polyester prints cleanly in the event of tension buildup between the platter and projector:
http://www.kodak.com/country/US/en/motion/newsletters/reel/may97/fail-safe.shtml

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John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: 585-477-5325 Cell: 716-781-4036 Fax: 585-722-7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion

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