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US 5,486,883 AGranted
Transparency protector
AssigneeEnbee Plastics, Inc.
InventorThomas A. Candido
Life of this patent
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AssigneeEnbee Plastics, Inc.
InventorThomas A. Candido
Estimating the term…
A protector adapted to accommodate a transparency to maintain it in a clean, dust-free and dry condition so that it may be used with an overhead optical projector to cast the image carried by the transparency onto a viewing screen. The protector is constituted by an open-ended rectangular sleeve whose dimensions are appropriate to those of the transparency, the sleeve including a front panel formed of transparent, acetate film that is breathable to permit a transparency inserted in the sleeve in a wet state to dry out. Also included is a rear panel formed of a transparent, synthetic plastic film of high strength having the same length as the front panel and joined thereto at one side edge to form a folder to receive the transparency so that it is then sandwiched between the panels. The width of the rear panel is greater than that of the front panel to form a flap that is folded over to define at the other side edge of the sleeve a margin that can be provided with a set of punch holes whereby the transparency-loaded protector can be kept when not in use in a ring binder or file.
A composite protector adapted to accommodate a transparency to maintain it in a clean, dust-free and dry condition so that it may be used with an overhead optical projector to cast the image carried by the transparency onto a viewing screen, the protector comprising an open-ended rectangular sleeve whose dimensions are appropriate to those of the transparency, the sleeve including a front panel formed of transparent, acetate film of relatively low strength that is breathable to permit a transparency inserted in the sleeve in a wet state to dry out, a rear panel formed of a transparent, synthetic-plastic film of high strength having the same length as the front panel and joined thereto at one side edge to form a folder to receive the transparency so that it is then sandwiched between the panels, the width of the rear panel being greater than that of the front panel to form a high strength flap that is folded over to define at the other edge of the sleeve a margin, said margin being provided with a set of punch holes whereby the transparency-loaded protector can be kept when not in use in a ring binder, said rear panel being formed of polypropylene.
A composite protector adapted to accommodate a transparency to maintain it in a clean, dust-free and dry condition so that it may be used with an overhead optical projector to cast the image carried by the transparency onto a viewing screen, the protector comprising an open-ended rectangular sleeve whose dimensions are appropriate to those of the transparency, the sleeve including a front panel formed of transparent, acetate film of relatively low strength that is breathable to permit a transparency inserted in the sleeve in a wet state to dry out, a rear panel formed of a transparent, polypropylene film of high strength having the same length as the front panel and joined thereto at one side edge to form a folder to receive the transparency so that it is then sandwiched between the panels, the width of the rear panel being greater than that of the front panel to form a high strength flap that is folded over to define a margin at the other side edge of the sleeve, one half section of the folded-over flap overlying the rear panel and being bonded thereto to form a strong margin section having holes punched therein, the other half section of the flap overlying an edge of the front panel and being free so that the front panel can be unfolded.
Dependencies are inferred from the claim text.