US4388793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for emptying envelopes
Assignee: STIELOW GmbH
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Filing: 1981-03-09
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Granted: 1983-06-21
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Expires: 2001-03-09
Abstract
Abstract An apparatus for removing the content from envelopes having two adjacent edges opened by slitting or cutting is equipped with two facing suction devices. At least one suction device is movable perpendicular to the envelope plane for separating the envelope. During the operating phase, one suction device is movable with respect to the other in the envelope plane in order to effect a relative movement between the envelope and the contents of the envelope. This facilitates removal because the envelope held by the suction device is additionally deformed, i.e., given a corrugated configuration by the movement in the envelope plane. As a result, easy removal of the envelope content is possible.
Inventors
- 👤 Wolfgang Kunne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
B; B43; B43M; B43M7/00; B43M7/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
An apparatus for emptying the contents of envelopes having at least two adjacent opened edges comprising: a pair of suction devices positioned for facing and holding opposite sides of an envelope to be emptied, wherein one suction device for holding one envelope side is movable perpendicular to the envelope plane for separating the sides of the envelope and wherein the other suction device for holding the opposite envelope side is movable along the envelope plane for providing relative movement between the envelope and envelope contents as the suction device movable perpendicular to the envelope plane separates the sides of the envelope.
Claim 2
Independent Claim
101 words
An apparatus for emptying the contents of envelopes having at least two adjacent opened edges comprising: a pair of suction devices positioned for facing and holding opposite sides of an envelope to be emptied, wherein one suction device for holding one envelope side is movable perpendicular to the envelope plane for separating the sides of the envelope and wherein the other suction device for holding the opposite envelope side is movable along the envelope plane for providing relative movement between the envelope and envelope contents as the suction device movable perpendicular to the envelope plane separates the sides of the envelope.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein the suction devices are staggered along the envelope plane.
Claim 4
Dependent Claim
36 words
An apparatus according to claim 2, further comprising an envelope backing member for the section device movable along the envelope plane, said backing member being connected to the suction device movable perpendicular to the envelope plane.
Claim 5
Dependent Claim
19 words
An apparatus according to claim 1, further comprising a light source for illuminating the inside of the opened envelope.
Claim 6
Dependent Claim
40 words
An apparatus according to claim 1, 2, or 3, further comprising means positioned for cutting or slitting at least two adjacent edges of an envelope to be emptied prior to receipt of the envelope between the pair of suction devices.
Claim 7
Dependent Claim
26 words
An apparatus according to claim 5, further comprising stop means for engaging one of the open envelope edges and positioning an envelope between the suction devices.
References Cited (Backward Citations)
US3566578A
Cited
US3739543A
Cited
US4123890A
Cited
US4159611A
Cited
US4156334A
Cited
GB2068906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |