US3838723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual dado machine
Assignee: COMMANDER IND Inc
•
Filing: 1973-07-27
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Granted: 1974-10-01
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Expires: 1993-07-27
Abstract
Abstract For use with a work member such as a wood strip there is provided a dual dado machine with a main frame having at the front a magazine for a stack of several of the strips. The bottom strip is fed from the magazine simultaneously to occupy a couple of work sites on the main frame. The strip is accurately positioned endwise and is clamped on the main frame by hold down devices. A pair of dado cutters are movable simultaneously from the back of the main frame and in selectable and preferably converging paths through the work sites to make dado cuts through the top of the held strip. The cutters are then returnable to the back of the main frame. The cut strip is released by the hold down devices and is ejected from the machine. The operating sequences are preferably automatically controlled.
Inventors
- 👤 E Sandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:42
CPC Classifications
B; B27; B27C; B27C5/00; B27C5/02; B27C5/06; B23; B23D; B23D45/00; B23D45/10; B23D47/00; B23D47/04; B23D47/042; B27F; B27F1/00; B27F1/02; B27F1/06; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2027; Y10T83/2029; Y10T83/2092; Y10T83/2096; Y10T83/2098; Y10T83/647; Y10T83/6571
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
A dual dado machine for use with an elongated work member having top, bottom and end surfaces comprising an elongated main frame extending through two work sites, a magazine on said frame for supporting a stack of said work members, means on said main frame for transferring a work member from said stack in said magazine to said work sites simultaneously, means on said main frame for holding said work member in said work sites, a pair of dado cutters, means for simultaneously moving both of said dado cutters on said main frame transversely and each into and out of a respective one of said work sites, and means on said main frame for ejecting said work member from said main frame.
Claim 2
Dependent Claim
122 words
A dual dado machine for use with an elongated work member having top, bottom and end surfaces comprising an elongated main frame extending through two work sites, a magazine on said frame for supporting a stack of said work members, means on said main frame for transferring a work member from said stack in said magazine to said work sites simultaneously, means on said main frame for holding said work member in said work sites, a pair of dado cutters, means for simultaneously moving both of said dado cutters on said main frame transversely and each into and out of a respective one of said work sites, and means on said main frame for ejecting said work member from said main frame.
Claim 3
Dependent Claim
27 words
A machine as in claim 1 including means responsive to the presence of a work member in said work sites for controlling operation of said transferring means.
Claim 4
Dependent Claim
27 words
A machine as in claim 1 including means responsive to the presence of a work member in said work sites for controlling operation of said moving means.
Claim 5
Dependent Claim
31 words
A machine as in claim 3 in which said controlling means is effective to move said dado cutters simultaneously into said work sites and then simultaneously out of said work sites.
Claim 6
Dependent Claim
23 words
A machine as in claim 1 in which said moving means includes means for guiding said dado cutters to move in predetermined paths.
Claim 7
Dependent Claim
12 words
A machine as in claim 5 in which said paths are converging.
Claim 8
Dependent Claim
12 words
A machine as in claim 5 in which said paths are parallel.
Claim 9
Dependent Claim
18 words
A machine as in claim 1 including means for urging said work member longitudinally in said work sites.
Claim 10
Dependent Claim
32 words
A machine as in claim 8 including a datum block and in which said urging means is effective on an end of said work member in a direction toward said datum block.
Claim 11
Dependent Claim
126 words
A dual dado machine for use with an elongated work member having top, bottom and end surfaces comprising an elongated main frame having a front portion and a rear portion, a pair of supports upstanding from said main frame in said rear portion thereof and spaced apart longitudinally of said main frame, dado cutter guides on said supports and extending transversely of said main frame, dado cutters movable along said guides, means on said main frame for simultaneously so moving said dado cutters, means on said main frame for holding a work member in a predetermined position for substantially simultaneous engagement by said moving dado cutters, and means for movably connecting at least one of said dado cutter guides to the respective one of said supports.
Claim 12
Dependent Claim
126 words
A dual dado machine for use with an elongated work member having top, bottom and end surfaces comprising an elongated main frame having a front portion and a rear portion, a pair of supports upstanding from said main frame in said rear portion thereof and spaced apart longitudinally of said main frame, dado cutter guides on said supports and extending transversely of said main frame, dado cutters movable along said guides, means on said main frame for simultaneously so moving said dado cutters, means on said main frame for holding a work member in a predetermined position for substantially simultaneous engagement by said moving dado cutters, and means for movably connecting at least one of said dado cutter guides to the respective one of said supports.
Claim 13
Dependent Claim
20 words
A machine as in claim 10 including means for establishing a predetermined travel of said dado cutters on said guides.
Claim 14
Dependent Claim
30 words
A machine as in claim 10 including means disposed on said front portion of said main frame for feeding a work member into said predetermined position on said main frame.
Claim 15
Dependent Claim
28 words
A machine as in claim 10 including means on said main frame for ejecting a work member from said predetermined position into said front portion of said mainframe.
Claim 16
Dependent Claim
27 words
A machine as in claim 13 including a conveyor on said main frame in said front portion thereof for receiving a work member from said ejecting means.
Claim 17
Dependent Claim
35 words
A machine as in claim 12 including a magazine for a stack of work members mounted on said main frame in said front portion thereof and for supplying said work members to said feeding means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |