| 摘要 |
PCT No. PCT/GB86/00043 Sec. 371 Date Nov. 20, 1988 Sec. 102(e) Date Nov. 20, 1988 PCT Filed Jan. 23, 1986 PCT Pub. No. WO86/04268 PCT Pub. Date Jul. 31, 1986.Apparatus for collecting and discharging waste material comprises peripheral rows of teeth arranged on rotatable cylindrical shafts. The teeth on each shaft intercalate so that an entrapment zone for waste material is formed thereat during contra-wise rotation of the shafts. The teeth in each row pass through respective slits formed between the blade edges of rectilinear scaper blades placed between the rows and resting on the shaft. The scraper blades remove waste material from and between the teeth for discharge from the machine. To prevent the waste material being caught by cutting action between the leading faces of the teeth passing the scraper blades edges the magnitude of the angle formed at any time between those leading faces and the blades edges as the teeth pass through slits, has a value determined by the shape of the leading faces of the teeth and blade edges of the scraper blades so that the inducement of frictional engagement in relation to the materials being handled is never sufficient for a biting or cutting action to ensue.
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