Package making – Methods – Opening only
Patent
1999-09-07
2000-07-25
Kim, Eugene
Package making
Methods
Opening only
533813, 533815, B65B 4326
Patent
active
060923539
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention concerns letter-openers designed to open correspondence on three sides, then to separate the contents from the envelope. It more precisely concerns a system permitting extraction of the contents from the envelope.
DESCRIPTION OF THE PRIOR ART
The present systems of extraction of correspondence perform the extraction of correspondence by separating the outside of the envelope from the contents, the envelope having been previously cut on three sides.
A first method, described for example in Document FR-A-2 706 146, utilizes one or two cylinders depressurized by a vacuum pump. The sides of the envelope are drawn by said cylinders and the contents are thus extracted with much efficacy. The great defect of this technology is the high sound level caused by the passage of air through the aspiration holes.
A second method utilizes the friction of a unit interposed in the path of the envelope. This friction may be caused by a shoe as in Document U.S. Pat. No. 3,739,543 or by a rotating brush, as in Document EP-A459 590. In both of these cases, the friction unit is brought into contact with the envelope by a mechanism.
The purpose of the invention is to propose a particular mechanism for extraction which allows obtaining a compact and unburdensome device.
SUMMARY OF THE INVENTION
The object of the invention is a device for the extraction of the contents of an envelope pre-cut on three sides, consisting of a frame, a means for carrying the pre-cut envelope in order to shift it on a path, a means of friction placed on the path of the envelope for its unfolding and the extraction of its contents, a means for receiving the empty envelopes, a means of receiving the extracted contents, and a means of control governing the synchronized operation of the preceding means, characterized in that the means of friction consists of abrasive units respectively above and below, forming a space for the movement of the envelope or its contents by friction and adjusted in order to move forward or rearward according to the following successive stages: at the back toward the front, whereby the upper fold of the envelope is rounded and opened, forward until the contents are disengaged from the movement space, but the opened envelope is held there, contents to slip out in order to be collected in the means for reception of contents.
The means for reception of contents are suitably arranged to allow immediate visual inspection of the contents, which allows the operator who is present to make sure that addressee references are well available therefrom. He may then start the following stage: means for reception. In the contrary case, the operator can take the envelope and attach it to the opened correspondence, or even write in the addressee references.
In accordance with a very advantageous characteristic of the invention, the abrasive units consist of reciprocal rollers, which permits a very compact arrangement and an easy control of the rotation of the lower and upper rollers to obtain forward and rearward movement. The means of carriage may be comprised of antagonistic rollers.
Thus it is advantageous that a first motor control the rotation of the antagonistic rollers and the lower abrasive rollers to which the former may be connected by a kinematic chain with pulley and belt, while a second motor controls the rotation of the upper abrasive rollers. For the sake of compactness, it is always advantageous that the device include upstream means for carrying a higher feed-level of pre-cut full envelopes and a lower level of reception of empty envelopes, wherein the means of carriage are bi-directional. A gauge-head advantageously detects the passage of the envelope between the means of carriage and the means of extraction.
BRIEF DESCRIPTION OF THE DRAWINGS
The characteristics and advantages of the present invention are highlighted by the description below of an example of an embodiment illustrated in the drawings hereto attached. In these drawings:
FIG. 1 is a developed sectional view of
REFERENCES:
patent: 3739543 (1973-06-01), Harris
patent: 4866915 (1989-09-01), Wise
patent: 4921388 (1990-05-01), Nelson
patent: 5156515 (1992-10-01), Charron et al.
patent: 5175979 (1993-01-01), Van Der Werff et al.
patent: 5179820 (1993-01-01), Van Der Werff
patent: 5983609 (1999-11-01), Van Der Werff et al.
Kim Eugene
SECAP
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