Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Patent
1983-01-03
1985-01-15
Simmons, David
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
156299, 156364, 156556, B32B 3100
Patent
active
044937431
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The subject invention concerns sheet-laminating machines designed to align two or more sheets to form a multiply sheet and comprising one upper and one lower sheet-deposit unit for positioning respectively top and bottom sheets, means for application of glue to the upper face of the bottom sheet, means for registering the sheets, presser means and a discharge unit.
In uniting sheets by machine as outlined above it is necessary that the sheets are carefully aligned and in register since otherwise printed articles, such as cardboard boxes and the like, made from the superposed and united sheets, after punching may take on an unacceptable appearance on account of poor registering. Problems may also arise when a thick sheet is to be laminated with a thinner one, since in such cases the two sheets usually react differently to the moisture to which they are exposed from the glueing, which may result in bulging or warping. Bulging or warped sheets may cause problems in e.g. punching machines.
Because of the requirements on alignment and even-levelness of superposed sheets prior-art sheet-laminating machines are comparatively large and expensive devices which usually include several micro-switches or photoelectric cells as well as pneumatically driven means.
The purpose of the subject invention is to provide a sheet-laminating machine designed for automatic superposing of sheets in aligned relationship. The machine comprises a smaller number of parts than conventional machines of this kind. Consequently, the machine is cheaper to manufacture and to run and is less noisy.
SUMMARY OF THE INVENTION
The machine in accordance with the invention is characterised in that the registering means consists of an upper registering plate which is designed to guide the upper sheets from the upper sheet-deposit unit to the plane of advancement of the bottom sheets, and of a lower registering plate which is designed to guide the bottom sheets in underneath a registering roll, said roll resting, in its starting position, on the lower registering plate and being mounted on a shaft with some play, said shaft extending transversely of the plane of advancement of the sheets, and being mounted so as to be vertically movable.
Because the sheet-deposit means, the sheet presser means and sheet discharge means may be operated synchronously and are spaced only short distances apart, the total machine length is very reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will be described in closer detail in the following with reference to the accompanying, partly diagrammatical drawings, wherein
FIG. 1 is a perspective view of a machine in accordance with the invention,
FIG. 2 is a schematic representation of the interior of the machine,
FIG. 3 shows on an enlarged scale an end view of the registering roll incorporated in the machine, and
FIGS. 4 and 5 show the registering roll in further enlarged views in two different positions when registering and aligning two sheets.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
The machine illustrated in FIG. 1 is equipped with an upper sheet-deposit unit 1 for feeding and positioning top sheets 2, and with a lower sheet-deposit unit 3 for feeding and positioning bottom sheets 4. The machine likewise comprises means 5 for applying glue on the upper face of the bottom sheet 4, and means 6 designed to position the two sheets 2 and 4 in register, presser means 7 to press the two sheets together, and a discharge unit 8. The relative positions of the various means appear more clearly from FIG. 2. Both the upper sheet-deposit unit 1 and the lower sheet-deposit unit 3 are provided with their respective belt conveyor 9, which conveyors are arranged to carry sheets past separation rails 10 up to two pairs of feeder rollers 11 and 12, respectively. The upper roller pair 11 is followed in the direction of advancement of the sheets by a registering plate 13 which is arranged in an oblique position, sloping towards the plane of advancement of the bottom sheet
REFERENCES:
patent: 2484701 (1949-10-01), Flynn
patent: 3112236 (1963-11-01), Hartmann
patent: 3540970 (1970-11-01), Huntwork
patent: 4288274 (1981-09-01), Holz
Kinds Industri AB
Simmons David
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