Card – picture – or sign exhibiting – Changing exhibitor – Shiftable display item or item support
Patent
1986-07-11
1988-07-05
Mancene, Gene
Card, picture, or sign exhibiting
Changing exhibitor
Shiftable display item or item support
40642, 40490, 40380, G09F 1130
Patent
active
047545640
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 4,276,348. 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 known picture-changers, there is provided as feeding means a retentive coating that makes surface-engagement with the sheet to be separated.
In earlier sheet-changers, made known from printed publications, a hook-like or strip-like transporter is used which engages the edge of the pile remote from the separating means, a pressure arrangement ensuring engagement. This earlier form of construction may be useful for stiff cards, especially when the number of cards forming the pile needs to be varied only within narrow limits.
The aim of the present invention is to provide a changer of this type which can be used for photographs.
In the case of photographs, conditions occur which the known changers fail to meet. The photographs are very thin, having a thickness of approximately 0.25 mm, consist of a paper/plastics laminate and therefore tend both to build up a static charge in dry atmospheres and to become sticky in moist atmospheres so that in both cases surprisingly high shearing forces may be required in order to separate two photos lying one on top of the other in the pile. As a result of the laminate construction described, the photos also become warped and bowed depending on the temperature and atmospheric moisture.
If it were desired to use the known devices unaltered for photographs, then the change system would fail: The transporter in the form of a hook or strip would not be able to hold the sheet to be separated securely and would slip off at some point during the feed travel. Although an increase in the pressure of the pressure arrangement would possibly improve somewhat the chances of the removal of the sheet from the pile, this would result in increased difficulties when returning the sheet to the pile.
According to the invention, this problem is solved by a device for the cyclic rearrangement of a pile of rectangular or square sheets, especially a pile of photographs, having 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 from one end of the pile and add it to the other end of the pile again, these means comprising: part and the remainder of the pile in the other frame part, and purpose of returning it to the other end of the remainder of the pile, wherein the retaining means for holding the individual sheet comprises a transporter engaging the rear edge (seen in the feeding direction) of the sheet to be separated, and there is provided on the side of the pile remote from the transporter a pressure arrangement which, at least over part of the travel of the frame parts, holds the sheet being separated in engagement with the transporter and wherein the guide means comprise means which, controlled by the movement of the frame parts, enable the i
REFERENCES:
patent: 405720 (1877-11-01), Weggelane
patent: 472702 (1892-04-01), Fichtner
patent: 3122844 (1964-03-01), Kharasch
patent: 3225471 (1965-12-01), Hallsburg
patent: 4241528 (1980-12-01), Ackeret
patent: 4259802 (1981-04-01), Ackeret
patent: 4376348 (1983-03-01), Ackeret
patent: 4546561 (1985-11-01), Ackeret
patent: 4550516 (1985-11-01), Ackeret
Contreras Wenceslao J.
Jackson Robert R.
Licinvest AG
Mancene Gene
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