Patent US3655181A successfully refreshed from Google Patents.
US3655181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing press feeder
Assignee: WHITACRE DAVID A
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Filing: 1970-12-23
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Granted: 1972-04-11
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Expires: 1990-12-23
Abstract
Abstract A mechanism for feeding lightweight sheets of paper, one at a time, to a printing press in which a rotationally oscillated vacuum drum with suction holes therein grasps pieces of paper off the bottom of a stack with each oscillation. The stack is adjustably supported at a predetermined height just above the oscillating feed drum to insure that only one piece of paper at a time is selected. An air jet is used to separate the edges of the paper sheets in the stack while a separating plate next to the drum operates to block off the suction holes at the end of each oscillation and separate each piece of paper from the oscillating drum.
Inventors
- 👤 Harold E Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:15
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/10; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/423; B65H2301/4232; B65H2301/42322
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
A printing press feeding means comprising in combination: a feed drum having a generally cylindrical portion with a plurality of circumferential grooves on said cylindrical portion, said cylindrical portion having at least one hole therein connected to a vacuum source so as to adapt said drum to grasp pieces of stock by suction; means connected to said feed drum adapted to rotationalLy oscillate said feed drum; a separation plate abutting said drum, said separation plate having a plurality of projections extending from the abutting edge of said plate and into said circumferential grooves, the oscillation of said feed drum being long enough to carry the vacuum holes periodically under said separation plate; a stack supporting member, adjustable in height, positioned to hold a stack of stock with the edges of the stock at a predetermined height above said drum; and air jet means just above said feed drum positioned to direct a jet of air at the edges of the stock near the drum so as to help separate them for easier grasping by said feed drum.
Claim 2
Dependent Claim
177 words
A printing press feeding means comprising in combination: a feed drum having a generally cylindrical portion with a plurality of circumferential grooves on said cylindrical portion, said cylindrical portion having at least one hole therein connected to a vacuum source so as to adapt said drum to grasp pieces of stock by suction; means connected to said feed drum adapted to rotationalLy oscillate said feed drum; a separation plate abutting said drum, said separation plate having a plurality of projections extending from the abutting edge of said plate and into said circumferential grooves, the oscillation of said feed drum being long enough to carry the vacuum holes periodically under said separation plate; a stack supporting member, adjustable in height, positioned to hold a stack of stock with the edges of the stock at a predetermined height above said drum; and air jet means just above said feed drum positioned to direct a jet of air at the edges of the stock near the drum so as to help separate them for easier grasping by said feed drum.
Claim 3
Dependent Claim
37 words
The apparatus of claim 1 in which said supporting member is pivotally supported on a frame which frame also supports said feed drum, said means connected to said drum, said separation plate, and said air jet means.
Claim 4
Dependent Claim
35 words
The apparatus of claim 2 in which said supporting member is adjustable in height by means of at least one threaded adjusting bolt on said frame positioned to engage the underside of said supporting member.
Claim 5
Dependent Claim
15 words
The apparatus of claim 3 in which said grooves have a generally rectangular cross section.
Claim 6
Dependent Claim
26 words
The apparatus of claim 4 in which said plurality of projections on said separation plate are generally rectangular so as to be congruent to said grooves.
Claim 7
Dependent Claim
27 words
The apparatus of claim 5 in which the drum contacting portions of said plurality of projections are beveled to a shape approximating the bottom of said grooves.
Claim 8
Dependent Claim
37 words
The apparatus of claim 6 in which there are a plurality of holes in said feed drum connected to a vacuum source, said holes being positioned in the cylindrical portion of said feed drum between said grooves.
References Cited (Backward Citations)
US600844A
Cited
US3497205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |