Abstract: Polypeptides having an RNase H activity highly useful in genetic engineering; genes encoding these polypeptides; and a process for genetic engineeringly producing these polypeptides.

Abstract: A finisher connected to a copying machine produces a bound booklet by inserting papers from the copying machine into a cover with an adhesive layer of a hot-melt adhesive which is coated on the inner surface of near a spine interconnecting a front board and a back board, and heating the cover and a sheaf of papers, and joining them by adhesion. Thus, the series of operations ranging from the preparation of documents through the bookbinding can be facilitated and expedited.

Abstract: An image forming apparatus is mounted in a copying machine or a printer and is adapted to serve the purpose of bundling and stapling a plurality of copied or printed sheets, automatically encasing the stapled bundle of sheets with a cover specially designed for enclosure, and binding the cover. The apparatus has an image memory, an image signal processing part, an image producing part, a sheet accumulating part, a cover storing part, a cover delivering part, a cover supporting part, a sheet delivering and inserting part, a heating part, and a CPU.

Abstract: A finisher is provided with a stapling unit which has a staple head and a staple anvil, the staple head and the staple anvil being separated and independently movable to a stapling point. When the staple head which contains staples is detected empty, the staple head goes to a staple cartridge exchange position. When a jam of staples is detected, the staple anvil goes to a retreating position. Also, a light emitting element is provided at the staple head and a light receiving element is provided at the staple anvil. First, the staple head is moved to/stopped at a specified stapling point, and then, the staple anvil is moved. The staple anvil is stopped when the light receiving element receives a light from the light emitting element.

Abstract: A finisher incorporating therein a stapler for accumulating a plurality of sheets and performing a stapling treatment on a bundle of accumulated sheets, comprising first sheet bundle conveying rollers disposed on the upstream side of the stapler relative to the direction of conveyance of the bundle of sheets and formed of a pair of rollers capable of converging toward and diverging from each other, second sheet bundle conveying rollers disposed on the downstream side of the stapler relative to the direction of conveyance of the bundle of sheets and formed of a pair rollers capable of converging toward and diverging from each other, and a sheet end detector disposed near the downstream side of the second sheet bundle conveying rollers and adapted to detect the leading end of the bundle of sheets in the direction of conveyance.

Abstract: A finisher comprising a non-sort tray disposed at an uppermost location, a stacking tray for stapling disposed at an intermediate location, and a large-capacity storing tray disposed at a lower location. In a non-sort mode, sheets discharged from a copying machine are first stored in the non-sort tray and, when the non-sort tray is occupied full, subsequent incoming sheets are stored in the storing tray. In a stapling mode, sheets are collected on the stacking tray and, after a stapling operation, they are stored in the storing tray.