Elongated-member-driving apparatus – Driving motion of driver has component in direction of...
Patent
1997-11-20
1998-12-15
Smith, Scott A.
Elongated-member-driving apparatus
Driving motion of driver has component in direction of...
270 53, B42B 402, B41F 1366
Patent
active
058487450
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a stapling device for transverse stapling of product elements, in particular in a folding apparatus downstream of a rotary printing press.
Description of the Prior Art
DE 29 32 757 C2 describes a stapling device in a folding apparatus of a rotary printing press. In this case a combined cutting and stapling cylinder is provided with female and male molds, which shape staples. The male mold is moved by means of a four-bar link.
It is disadvantageous in connection with this stapling device that during the stapling process the staple performs a relative movement in the circumferential direction in relation to the collecting cylinder and the product elements. This can result in damage of the products and pulled-out stapled connection.
EP 06 06 555 A1 describes a rotating stapling apparatus with stapling heads arranged in a star shape. These stapling heads are pivotable and work together with supports fixed in place on a collecting drum. It is disadvantageous here that the stapling heads perform a back-and-forth movement, so that large acceleration forces are required.
A stapling device is known from U.S. Pat. No. 2,727,383. In this device, a stapling head, which is capable of swinging back-and-forth, cooperates with a counter support fixed on the cylinder.
EP 05 20 967 A1 discloses a stapling device wherein the stapling heads, as well as the counter supports, are respectively rotatingly arranged on separate cylinders. It is disadvantageous here that the counter support is rotatingly arranged on a cylinder.
SUMMARY OF THE INVENTION
It is the object of the invention to provide a stapling device for transverse stapling of product elements, wherein in the course of a stapling process a staple does not perform a relative movement in the circumferential direction in respect to the product elements to be stapled or respectively to a counter cylinder.
In accordance with the invention, a stapling cylinder is provided with stapling heads which are arranged to work with a counter cylinder that is provided with staple closure beds. The stapling heads point in the direction of the axis of rotation of the counter cylinder during the stapling process. The stapling cylinder or cylinders are disposed on a rotating stapling cylinder support. The speed of rotation of the stapling cylinder approximately corresponds to a sum of the rotational speed of the stapling cylinder support plus the rotational speed of the counter cylinder.
The advantages which can be attained by means of the invention primarily consist in that relative movements of the staples vertically in respect to the stapling movement in relation to the product elements or respectively to the opposed closure beds are avoided to a large degree. By means of this bending stresses acting on the staples and the opposed closure beds are reduced. This stapling movement generates a great stapling quality, since the tearing of the staple out of the product elements is prevented. By means of the optimized stapling movement it is possible to staple product elements which, in comparison to the prior art, are thicker, or respectively more layers of product elements, as well as to achieve higher production speeds. Furthermore, the load acting on the stapling device because of vibrations is reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
The stapling device in accordance with the invention is represented in the drawing and will be described in more detail in what follows.
Shown are in:
FIG. 1, a schematic lateral view of a stapling device in accordance with the invention;
FIG. 2, a schematic sectional view of the stapling device in accordance with the invention;
FIG. 3, a schematic representation of an enlarged portion of a movement progression in the course of a stapling process in accordance with FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In side frames 1, 2 of, for example a folding apparatus of a rotary printing press, a cutting and stapling cylinder support 3 and a collecting cylinder 4 acting as counter cylin
REFERENCES:
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patent: 5172897 (1992-12-01), Hansch et al.
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patent: 5356125 (1994-10-01), Hansch et al.
patent: 5464199 (1995-11-01), Stauber
patent: 5570832 (1996-11-01), Meier
patent: 5590828 (1997-01-01), Stauber
patent: 5772097 (1998-06-01), Hillebrand
Koenig & Bauer--Albert Aktiengesellschaft
Smith Scott A.
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