Sheet feeding or delivering – Feeding and delivering – Conveyor releases to subsequent conveyor
Reexamination Certificate
1999-12-09
2001-09-25
Ellis, Christopher P. (Department: 3651)
Sheet feeding or delivering
Feeding and delivering
Conveyor releases to subsequent conveyor
C271S003240, C271S004030, C271S004060
Reexamination Certificate
active
06293535
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for individualizing blanks of paper, plastic, or similar materials, and placing the individualized blanks onto a continuously moving carrier, wherein the device comprises an individualizer that transfers the blanks individually to a vacuum feeder and wherein the continuously moving carrier is arranged downstream of the vacuum feeder in the transport direction. The continuously moving carrier has a higher transport speed than the individualizer.
2. Description of the Related Art
In such known devices, the transfer of blanks from the vacuum feeder onto the carrier is problematic, especially when a position-precise placement is desired.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a device of the aforementioned kind with which a position-precise placement of the blanks onto the continuously moving carrier is ensured at a high velocity.
In accordance with the present invention, this is achieved in that the individualizer transfers the blanks onto the lower belt portion of the vacuum feeder (upside down transfer), wherein the vacuum feeder is driven in a cycled operation and has a transport speed that is synchronizable with that of the carrier.
Since the blanks, for example, telephone cards etc., are transferred onto the lower belt portion of the vacuum feeder, they are placed smoothly without abrupt transition, i.e., tangentially, onto the surface of the carrier. When the vacuum feeder and the carrier operate at identical speed at the moment of transfer of a blank, a point-precise transfer is ensured. Since the vacuum feeder is driven faster than the individualization process takes place, a gap is provided between the blanks placed onto the vacuum feeder. This gap is used for controlling the operation, for example, by means of a sensor. The sensor for controlling the timed drive cycle of the vacuum feeder is preferably positioned below the vacuum feeder adjacent to the transfer end. The sensor is preferably adjustable in the transport direction of the vacuum feeder.
When the device is advantageously embodied such that at the transfer end of the vacuum feeder pressing rollers are provided which rest and rotate freely on the carrier and are preferably supported on the deflection shaft of the vacuum feeder, the pressing rollers provide a smooth and precise transfer from the vacuum feeder onto the surface of the carrier. The timed drive cycle controls the movement of the vacuum feeder such that the vacuum feeder, upon transfer of a blank onto the surface of the carrier, is always moved at the speed of the carrier so that problems resulting from differing transport velocities are eliminated. The gaps between the blanks are sufficiently large to always ensure acceleration of the intermittently stopped vacuum feeder to the desired transport speed.
REFERENCES:
patent: 4451027 (1984-05-01), Alper
patent: 4696715 (1987-09-01), Bahr
patent: 5004218 (1991-04-01), Sardano et al.
patent: 5006042 (1991-04-01), Park
patent: 5050852 (1991-09-01), Sawada et al.
patent: 5172898 (1992-12-01), Takahashi
patent: 5326088 (1994-07-01), Newsome
patent: 5360316 (1994-11-01), O'Mara et al.
patent: 5613670 (1997-03-01), Ballestrazzi et al.
Bower Kenneth W
Ellis Christopher P.
Friedrich Kueffner
Pfankuch Maschinen GmbH
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