# US 5,704,543 A · Window-envelope

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- Number: US 5,704,543 A
- Document ID: US5704543A
- Status: Granted
- Kind: A
- Application number: 08/586,680
- Filed: 1996-01-25
- Granted: 1998-01-06
- Earliest claimed: 1993-07-28
- Inventors: Kari Pollanen
- Web page: https://patentgrep.com/patent/US5704543A

## CPC

- B65D 27/06: with provisions for repeated re-use
- B65D 27/04: with apertures or windows for viewing contents
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES

## Abstract

The present invention is related to an envelope (1) provided with at least one window (2), said envelope being intended for double-use as a reply envelope, too. Said window is provided with a detachable flap (3), whereby said window of the envelope can be made larger by tearing off said flap from the envelope. Subsequently, the envelope can be reused for mailing a reply whereas the enlarged window of the envelope will now display the receiver name and address information preprinted on the reply letter, plus the prepaid reply postage markings and other possibly desirable information.

## Claims

### Claim 1

A mailing envelope (1) having a front wall and a rear wall, one of said walls being provided with at least one window (2), and a detachable flap (3), said envelope being intended for sequential use as both a sender's envelope and a reply envelope, wherein said window (2) contains two areas (2', 2"), a first of said areas being for displaying a recipient's name and address information appearing on an insert of said envelope and a second of said areas being for displaying postal markings, said detachable flap being contained in said second area prior to detachment of said flap from said envelope, said first area being sufficiently large to display the name and address information prior to detachment of said flap.

### Claim 2 (depends on 1)

An envelope as defined in claim 1, wherein said flap (3) is adapted to cover the upper part of the window (2).

### Claim 3 (depends on 1)

An envelope as defined in claim 1 wherein said flap (3) is made detachable by means of a perforation (4) from the material surrounding the window (2) of the envelope (1).

### Claim 4 (depends on 2)

An envelope as defined in claim 2, wherein said detachable flap (3) is located at the upper right corner of the front wall of the envelope (1).

### Claim 5 (depends on 2)

An envelope as defined in claim 2, wherein said flap (3) is made detachable by means of a perforation (4) from the material surrounding the window (2) of the envelope.