Transparency mounts with circular recesses at each corner - providing coding facility by selective piercing or colour plugging

摘要

Slide mounts for 35mm transparencies has a coded marking to facilitate sorting and correct orientation for projection. Each mount has four thin material sections (01) at each corner embedded in recesses so that when the slide has been mounted any perforation can be pushed through or colour plugged. All sides can then be easily aligned using the colour or other coding, in the projector magazine. Vertical and horizontal formats can be mixed.