US3724766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shredder
Assignee: Ketcham and Mcdougall Inc
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Filing: 1971-05-14
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Granted: 1973-04-03
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Expires: 1991-05-14
Abstract
Abstract A paper shredder comprises a housing containing rotatable shredder blades, a driving motor and suitable reduction gears. A cover member containing a paper chute is hingedly supported on the housing. The cover member includes a retaining portion at one end which is adapted to fit on the top of a wastepaper basket. At the other end of the cover member a second retaining portion is secured to slide rails which are adjustable relative to the cover. By moving the retainer member, the relative distance between the two retaining portions can be adjusted to accommodate different-sized wastepaper baskets. A suitable limit switch operated by a sensing wire is secured within the cover member to actuate the motor which controls the shredder blades.
Inventors
- 👤 J Bosland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/0007; B02C2018/0023; B02C2018/0046; B02C2018/0069
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, and means cooperating with said housing and cover member for securing said cover member to said housing.
Claim 2
Dependent Claim
88 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, and means cooperating with said housing and cover member for securing said cover member to said housing.
Claim 3
Dependent Claim
116 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said cover member to said housing, a motor for driving said shredder blades, a switch for enabling said motor and a sensing wire for actuating said switch, said sensing wire being positioned across said chute.
Claim 4
Dependent Claim
116 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said cover member to said housing, a motor for driving said shredder blades, a switch for enabling said motor and a sensing wire for actuating said switch, said sensing wire being positioned across said chute.
Claim 5
Dependent Claim
132 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said cover member to said housing, a motor for driving said shredder blades, a first switch for enabling said motor, a sensing wire for actuating said first switch, said sensing wire being positioned across said chute and a safety switch for enabling said motor only when the cover member is closed.
Claim 6
Dependent Claim
132 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said cover member to said housing, a motor for driving said shredder blades, a first switch for enabling said motor, a sensing wire for actuating said first switch, said sensing wire being positioned across said chute and a safety switch for enabling said motor only when the cover member is closed.
Claim 7
Dependent Claim
108 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said member to said housing, said shredder blades including a plurality of disks and paper strippers positioned between adjacent disks for stripping the paper from the disks.
Claim 8
Dependent Claim
108 words
A paper shredder comprising a housing, rotatable shredder blades mounted in said housing, an upper cover member hingedly connected to said housing, said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said member to said housing, said shredder blades including a plurality of disks and paper strippers positioned between adjacent disks for stripping the paper from the disks.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |