Sheet-material associating – Associating or disassociating – Signature associating
Patent
1988-12-16
1990-12-11
Look, Edward K.
Sheet-material associating
Associating or disassociating
Signature associating
271100, B65H 3902
Patent
active
049764209
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method for gathering signatures and to a gathering machine for working the method.
In the method of the invention, the signatures lying face to face in a stack and standing on the back edge, are fed to a delivery position with the face engaging an abutment, and the signature engaging the abutment is gripped and is extracted from the delivery position so as to be opened and positioned straddlewise on a conveyor path.
In prior art gathering machines operating according to this principle, the signature in the delivery position is extracted from the stack by the signature being gripped at the back edge by a rotating transfer drum, and is then carried against a stop by means of the drum in order that the signature shall then be gripped by two opening drums rotating continuously about axes which are parallel to the axis of the transfer drum, and shall be drawn in the opposite moving direction by these opening drums and, while the signature is being opened, shall be deposited upon the conveyor path.
GB-A-l,3ll,l5l describes a machine for handling signatures, which includes opening drums for extracting the signatures from a stop.
In such machines, a high noise level arises due to the fact that the signatures hit the stop, and additionally the operating speed is limited by the change of moving direction of the signature. Moreover, the stop must be adjusted to different sizes. In addition to these functional drawbacks there is the further drawback that the machine is of a complicated construction due to the presence of three co-operating drums, the transfer drum and the two opening drums.
The purpose of the invention is to provide a faster and more reliable gathering of the signatures by using simpler and more dependable apparatus than that available today.
For said purpose the method of the invention is characterized in that the signature in the delivery position is pushed up to project upwards at the opposite edge from the stack and is then gripped at said edge so as to be carried by a continuous movement in an unchanged moving direction successively through the steps of being extracted from the stack, turned upside-down and opened while being deposited upon the conveyor path.
For working the method the invention also provides a machine for gathering signatures, comprising means for feeding the signatures lying face to face in a stack and standing on the back edge thereof, to a delivery position with the face engaging an abutment, and means for extracting the signature engaging the abutment, from the delivery position. The gathering machine is characterized in that a device having carriers to be engaged with the face of the signature in the delivery position, can be reciprocated along the plane of said signature to lift the signature to a position wherein the opposite edge projects from the stack tangentially to one of two drums forming part of the extraction means, said drums having grippers and being continuously rotated about parallel axes in opposite rotational directions .
In order to illustrate the invention this will be described in more detail below with reference to the accompanying drawings in which
FIG. 1 is a somewhat diagrammatic side view of a gathering machine for working the method of the invention,
FIG. 2 is an enlarged view, also somewhat diagrammatic, of the essential functional elements of the gathering machine,
FIG. 3 is a perspective view of a constructive embodiment of the gathering machine,
FIG. 4 is a fragmentary side view of one of the opening drums in a modified embodiment of the gathering machine,
FIG. 5 is a plan view on a reduced scale of the opening drum in FIG. 4 and illustrates the function thereof, and
FIG. 6 is a view corresponding to that in FIG. 4 of one of the opening drums in another modified embodiment but for the same function as that illustrated in FIG. 5.
The gathering machine comprises a frame 10 and is positioned adjacent a conveyor path 11 for gathering signatures on said conveyor path which in a known manner comprises a saddle rail 12 and a
REFERENCES:
patent: Re21489 (1940-06-01), Kleineberg
patent: 3949978 (1976-04-01), Swanson
patent: 4491311 (1985-01-01), Glanzmann
patent: 4706950 (1987-11-01), Ruetschle
Flensburg Carl G. A.
Isaksson Rolf H. V.
Look Edward K.
Newholm Therese M.
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