Card – picture – or sign exhibiting – Changing exhibitor – Shiftable display item or item support
Patent
1986-07-11
1988-08-16
Mancene, Gene
Card, picture, or sign exhibiting
Changing exhibitor
Shiftable display item or item support
40490, 40513, 40122, 40 10R, G09F 1130
Patent
active
047634294
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for the cyclic rearrangement of a pile of rectangular or square sheets, or a so-called "picture-changer".
Picture changers are known from U.S. Pat. Nos. 4,238,898, 4,238,899, 4,241,528, 4,241,529, 4,245,417, 4,259,802 and 4,376,348. These specifications are all based on the principle that a pile of pictures, especially photographic prints, is held by two frame parts that are movable relative to one another, one of which may have a viewing window. During each complete cycle of movement of the frame parts, that is, pulling them fully away from each other and sliding them fully back together again, one picture is removed from one end of the pile and returned to the other end of the pile again. The picture changers have the following components for this:
a feeding means feeds pictures to a separating means; the separating means detaches an individual picture from the pile; a retaining means holds the individual picture separated from the pile in one of the frame parts whilst the remainder of the pile is held in the other frame part; a guide means guides the separated individual picture such that it goes onto the other end of the remainder of the pile.
In the publications mentioned, the feeding and retaining means are formed by one and the same element, namely a retentive coating engaging with surface contact on the sheet to be separated. This is intended to eliminate a drawback of prior proposals, in which, as the feeding and retaining means, there was provided a hook or a ledge which engages the edge of the pile remote from the separating means. Such sheet changers may be used for relatively stiff, card-like sheets and it is possible to manufacture them inexpensively. If the sheets to be changed are photographic prints, however, which are only about 0.25 mm thick and additionally tend to cling tightly together, then a feeding means having a retentive coating engaging only with surface contact may not work effectively. A hook-form or ledge-form transporter, on the other hand, may transfer the required shearing forces, but, even if used as the retaining means also, involves the danger that the individual sheet may slide off the hook or ledge as the frame parts are pulled apart.
It is the aim of the invention to design a device of the type mentioned in the introduction that is reliable in operation and inexpensive to manufacture.
To solve this problem, there is used according to the invention a device for the cyclic rearrangement of a pile of rectangular or square sheets, especially a pile of photographic prints, which is provided with a first and a second frame part which may be moved relative to one another and parallel to the main plane of the pile, and with means that, on movement of the frame parts backwards and forwards, remove an individual sheet at one end of the pile and add it to the other end of the pile again, these means comprising: and the remainder of the pile in the other frame part, and of returning it to the other end of the remainder of the pile, sheet to be separated at its rear edge in the direction of transport, whilst as the retaining means for the separated sheet there is provided at least one additional element. For the above-mentioned reasons a hook-like or ledge-like element is preferred as the transporter, which may also be combined with a retentive coating. The engagement between the transporter and the pile is preferably ensured by spring pressure, in order to accommodate different thicknesses of pile and also warping and bowing of the sheets, which occurs frequently with photographic prints.
The concept of the invention may be embodied in a wide variety of ways. In particular, retaining means of varying construction may be used and the separating means and the guide means may be modified in many respects.
A number of structural designs of the concept are illustrated in the accompanying drawings and are described in detail below.
The drawings are largely diagrammatic and are restricted to the details that are essential for each individual case or th
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Contreras Wenceslao J.
Ingerman Jeffrey H.
Licinvest AG
Mancene Gene
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