US4945971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder cords for venetian blinds
Assignee: Newell Operating Co
•
Filing: 1989-05-26
•
Granted: 1990-08-07
•
Expires: 2009-05-26
Abstract
Abstract The lateral chain legs of ladder cords for Venetian blinds in accordance with the invention are formed with regularly spaced openings to allow mounting of the cord. This is made possible by cutting the ladder cord to the desired length and removing the transverse cross connectors at the end portions of the cord, whereupon the cord may be mounted with the aid of the openings in the header and bottom mounting rails of the blind and the ladder cord length can be adjusted to any blind length. When the ladder cord is intended for use with Venetian blinds of standard lengths the chain legs need be provided with mounting openings only at the end portions of the standard length ladder cords.
Inventors
- 👤 Sune I. Ivarsson
- 👤 Sten A. Smederod
- 👤 Karl-Erik Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:19
CPC Classifications
E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/38; E06B9/382; D; D04; D04B; D04B21/00; D04B21/10; D10; D10B; D10B2403/00; D10B2403/03; D10B2403/031; D10B2403/0311; D10B2503/00; D10B2503/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
176 words
A ladder cord for a venetian blind comprising: a pair of chain legs comprising a first chain leg and a second chain leg formed by crocheting and vertically aligned substantially parallel to each other; a plurality of cross connectors formed from at least one continuous cross connector thread having portions integrated into said first and second chain legs and having portions extending crosswise between said first and second chain legs at predetermined intervals thereof to support slats of the venetian blind; and a pair of mounting openings comprising a first opening positioned at a predetermined height on said first chain leg and a second opening opposingly positioned on said second chain leg at a height substantially equal to the height of said first opening, wherein each mounting opening comprises a loop formed between one of said chain legs and an integral thread extending outwardly from said one of said chain legs and returning back into said same one of said chain legs and wherein each mounting opening is capable of receiving a venetian blind mounting means.
Claim 2
Dependent Claim
176 words
A ladder cord for a venetian blind comprising: a pair of chain legs comprising a first chain leg and a second chain leg formed by crocheting and vertically aligned substantially parallel to each other; a plurality of cross connectors formed from at least one continuous cross connector thread having portions integrated into said first and second chain legs and having portions extending crosswise between said first and second chain legs at predetermined intervals thereof to support slats of the venetian blind; and a pair of mounting openings comprising a first opening positioned at a predetermined height on said first chain leg and a second opening opposingly positioned on said second chain leg at a height substantially equal to the height of said first opening, wherein each mounting opening comprises a loop formed between one of said chain legs and an integral thread extending outwardly from said one of said chain legs and returning back into said same one of said chain legs and wherein each mounting opening is capable of receiving a venetian blind mounting means.
Claim 3
Dependent Claim
28 words
The ladder cord as claimed in claim 1, wherein said pair of openings is positioned on opposite chain legs substantially adjacent one of the plurality of cross connectors.
Claim 4
Dependent Claim
29 words
The ladder cord as claimed in claim 1, wherein said pair of openings is positioned on opposite chain legs substantially halfway between two of said plurality of cross connectors.
Claim 5
Dependent Claim
56 words
The ladder cord as claimed in claim 1, wherein at least one of said plurality of cross connectors is omitted at an interval determined by a predetermined length of the venetian blind, and wherein said pair of mounting openings is formed in said parallel chain legs spaced a predetermined distance from a closest remaining cross connector.
Claim 6
Dependent Claim
70 words
The ladder cord as claimed in claim 1, wherein one of said plurality of cross connectors is omitted from said ladder cord at the beginning thereof and one of said plurality of cross connectors is omitted at the end of a predetermined length of the ladder cord and wherein said pair of openings is formed on said ladder cord where said one of said plurality of cross connectors is omitted.
Claim 7
Dependent Claim
36 words
The ladder cord as claimed in claim 1, wherein said mounting means is a pin arranged to be inserted into said openings and into a mounting rail for securing said ladder cord to said mounting rail.
Claim 8
Dependent Claim
21 words
The ladder cord as claimed in claim 1, wherein said integral thread is said at least one continuous cross connector thread.
Claim 9
Dependent Claim
26 words
The ladder cord as claimed in claim 6, wherein said ladder cord is secured to said mounting rail at a lower end of said venetian blind.
Claim 10
Dependent Claim
26 words
The ladder cord as claimed in claim 6, wherein said ladder cord is secured to said mounting rail at an upper end of said venetian blind.
References Cited (Backward Citations)
US2031981A
Cited
US2275273A
Cited
US3256928A
Cited
US3971427A
Cited
US4154281A
Cited
US4236567A
Cited
US4487243A
Cited
US4621673A
Cited
US4593738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |