Kodak 990, 9500 manual Product description, the gap release feature

Kodak Digital Science Document Scanner/Microimager 990

Product description	The Kodak Digital Science Document Scanner/Microimager 990 is a high-
	performance (up to 120 pages-per-minute*) rotary document scanner and
	microfilmer designed for medium- to high-volume digital capture of
	business documents. The Scanner/Microimager 990 captures printed
	characters, handwritten text, and graphics from documents of various sizes
	(from 2.5 in [64 mm] to 30 in [762 mm] long and from 2.5 in [64 mm] to 12
	in [305 mm] wide) and thicknesses (standard documents up to 0.014
	inches [0.36 mm]; even thicker documents may be scanned/filmed using
	the gap release feature).

The Scanner/Microimager 990S captures front and back page images from two-sided documents on film while simultaneously scanning the front side.

The Scanner/Microimager 990D captures front and back page images from two-sided documents on film while simultaneously scanning the front and back sides.

Scanned page images are transmitted to a host computer along with an Image Header which contains a variety of information, allowing for easy indexing, database storage and retrieval.