Card – picture – or sign exhibiting – Changing exhibitor – Shiftable display item or item support
Patent
1986-07-11
1988-10-18
Mancene, Gene
Card, picture, or sign exhibiting
Changing exhibitor
Shiftable display item or item support
40511, G09F 1130
Patent
active
047777486
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. 4238898, 4238899, 4241528, 4241529, 4245417, 4259802 and 4376348. 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.
Here and hereinafter such devices are also referred to as "sheet changers" or "picture changers" and the term "sheet" and "picture" are likewise used synonymously.
The picture changers known from the abovementioned publications use one and the same element for the feeding means and retaining means, which secures the individual sheet in the first frame part. Since, however, the functions of these two devices are different, it is preferable for separate elements to be used.
It is the aim of the present invention to produce a picture changer having a design that is especially well adapted to the functions of the individual sheet retaining means.
According to the invention, a device for the cyclic rearrangement of a pile of rectangular or square sheets, especially a pile of photographic prints, 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 from one end of the pile and add it to the other end of the pile again, these means comprising:
(a) a separating means for separating the individual sheet from the pile,
(b) a feeding means for feeding sheets to the separating means,
(c) retaining means for holding the individual sheet in the first frame part and the remainder of the pile in the other frame part, and
(d) a guide means for guiding the separated individual sheet for the purpose of returning it to the other end of the remainder of the pile, wherein the retaining means for holding the individual sheet comprises:
(1) a roller which is arranged on the second frame part and which rolls, on the individual sheet which is to be held firm, at a peripheral speed which is equal to the relative speed between the two frame parts, and
(2) a support member on the side of the individual sheet remote from the roller which is either a complementary roller arranged on the second frame part or a rail complementary to the roller provided on the first frame part, and wherein the roller and the complementary member hold the individual sheet by means of a pressure arrangement.
This solution has the following advantages:
The separating means in principle comprises an element defining a gap, relative to which element the individual sheet, together with the first frame part, is to be moved. The roller, which is also arranged on the second frame part, may then be structurally combined with this so-called "separator" and therefore requires only a small amount of space. The construction according to the invention means that there is no longer any need for any of the components to "cross" the path of the separator, and the retaining means is, for example when engaging the edges of the individual sheet, superior to other retaining means of different construction because it provides better
REFERENCES:
patent: 4238898 (1980-12-01), Ackeret
patent: 4241529 (1980-12-01), Baur
patent: 4259802 (1981-04-01), Ackeret
Hakomaki J.
Jackson Robert R.
Licinvest AG
Mancene Gene
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