Patent US3753558A successfully refreshed from Google Patents.
US3753558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet-folding machine
Assignee: Delfold Corp
•
Filing: 1970-12-30
•
Granted: 1973-08-21
•
Expires: 1990-12-30
Abstract
Abstract A sheet-folding machine for providing a sheet with a V-folded portion and with pleats situated between the V-folded portion. The machine includes a pair of rolls for feeding and simultaneously creasing a sheet while the latter is advanced by the rolls along a predetermined feed axis located in a predetermined feed plane extending between the rolls parallel to the axes thereof. A folding assembly is provided for folding a Vfold in a sheet, and this folding assembly includes an outer pair of sheet-supporting plates situated equidistantly from the feed plane as well as a pair of inner folding plates inclined inwardly toward the feed plane to be received between the outer plates so as to form a V-fold in a sheet while the latter is advanced toward the rolls. A pair of pleating members are situated at least temporarily in the space between the outer plates on opposite sides of a pleating plane which contains the feed axis and is normal to the feed plane for forming side pleats in a sheet simultaneously with the formation of a V-fold therein. Thus, the sheet which is folded and creased by the rolls will have not only a V-folded portion but also at least a pair of pleats situated between the V-folded portion.
Inventors
- 👤 I Sheroff
- 👤 H Berwanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:22
CPC Classifications
B; B65; B65H; B65H45/00; B65H45/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
428 words
In a sheet-folding machine, a pair of rolls respectively having parallel axes of rotation and situated adjacent and on opposite sides of a predetermined feed plane situated between and parallel to said axes of rotation for feeding and simultaneously creasing a sheet passing between said rolls along a predetermined feed axis situated in said feed plane, a folding assembly for forming a V-fold in a sheet received between said rolls, said folding assembly being located ahead of said rolls, considered in the direction of sheet travel, and including an outer V-fold means and an inner V-fold means, said outer V-fold means having a pair of spaced sheet-supporting portions provided with oppositely inclined sheet-engaging surfaces which converge toward said rolls and which are situated equidistantly from said feed plane on opposite sides thereof and define between themselves a tapered space through which said feed plane symmetrically extends and across which a sheet initially extends before a V-fold is formed therein, said inner V-fold means being aligned with said space to be received therein for forming a V-fold in a sheet prior to feeding and creasing of the sheet by said rolls, and said inner V-fold means including a pair of folding plates respectively having the same inclination as said sheet-engaging surfaces of said sheet-supporting portions and also defining between themselves a tapered space through which said feed plane symmetrically extends, means operatively connected with one of said V-fold means for advancing it, without changing its inclination, along said feed axis with respect to the other of said V-fold means to situate said inner V-fold means in said space between said sheet-supporting portions to form a V-fold in a sheet, support means supporting said other V-fold means for maintaining the latter V-fold means stationary while said one Vfold means is advanced along said feed axis with respect to said other V-fold means, and a pair of pleating members situated on opposite sides of a pleating plane which is normal to said feed plane and which also contains said feed axis, said pleating members being movable into and out of said space defined between said sheet-engaging surfaces and said pleating members being situated in the latter space at least during part of the time that a sheet is folded by said folding assembly for forming a pair of side pleats between a V-folded sheet portion so that during subsequent feeding and creasing of the sheet by said rolls the sheet will be provided with an outer V-folded portion and with a pair of inner pleats situated between said outer V-folded portion.
Claim 2
Dependent Claim
428 words
In a sheet-folding machine, a pair of rolls respectively having parallel axes of rotation and situated adjacent and on opposite sides of a predetermined feed plane situated between and parallel to said axes of rotation for feeding and simultaneously creasing a sheet passing between said rolls along a predetermined feed axis situated in said feed plane, a folding assembly for forming a V-fold in a sheet received between said rolls, said folding assembly being located ahead of said rolls, considered in the direction of sheet travel, and including an outer V-fold means and an inner V-fold means, said outer V-fold means having a pair of spaced sheet-supporting portions provided with oppositely inclined sheet-engaging surfaces which converge toward said rolls and which are situated equidistantly from said feed plane on opposite sides thereof and define between themselves a tapered space through which said feed plane symmetrically extends and across which a sheet initially extends before a V-fold is formed therein, said inner V-fold means being aligned with said space to be received therein for forming a V-fold in a sheet prior to feeding and creasing of the sheet by said rolls, and said inner V-fold means including a pair of folding plates respectively having the same inclination as said sheet-engaging surfaces of said sheet-supporting portions and also defining between themselves a tapered space through which said feed plane symmetrically extends, means operatively connected with one of said V-fold means for advancing it, without changing its inclination, along said feed axis with respect to the other of said V-fold means to situate said inner V-fold means in said space between said sheet-supporting portions to form a V-fold in a sheet, support means supporting said other V-fold means for maintaining the latter V-fold means stationary while said one Vfold means is advanced along said feed axis with respect to said other V-fold means, and a pair of pleating members situated on opposite sides of a pleating plane which is normal to said feed plane and which also contains said feed axis, said pleating members being movable into and out of said space defined between said sheet-engaging surfaces and said pleating members being situated in the latter space at least during part of the time that a sheet is folded by said folding assembly for forming a pair of side pleats between a V-folded sheet portion so that during subsequent feeding and creasing of the sheet by said rolls the sheet will be provided with an outer V-folded portion and with a pair of inner pleats situated between said outer V-folded portion.
Claim 3
Dependent Claim
29 words
The combination of claim 1 and wherein a means is operatively connected with said pleating members for moving them simultaneously inwardly toward and outwardly away from said pleating plane.
Claim 4
Dependent Claim
45 words
The combination of claim 1 and wherein said means for moving one of said V-fold means is operatively connected with said inner V-fold means for moving the latter into and through said space between said sheet-engaging surfaces toward and in close proximity to said rolls.
Claim 5
Dependent Claim
36 words
The combination of claim 3 and wherein a stripper means coacts with said inner V-fold means for stripping a V-folded sheet therefrom while delivering the thus-folded sheet between said rolls to be fed and creased thereby.
Claim 6
Dependent Claim
59 words
The combination of claim 4 and wherein said means operativelY connected to said inner V-fold means to move the latter with respect to said outer V-fold means is also operatively connected with said inner V-fold means to retract the latter away from said rolls while said stripper means engages a V-folded sheet, in order to facilitate the stripping action.
Claim 7
Dependent Claim
22 words
The combination of claim 1 and wherein a supply means coacts with said outer V-fold means for automatically supplying sheets successively thereto.
Claim 8
Dependent Claim
79 words
The combination of claim 1 and wherein said pair of pleating members form a pair of inner pleating members for forming inner pleats between the V-folded sheet portion, and four outer pleating members situated two on one side and two on the other side of said pleating plane for forming in the sheet outer pleats between which inner pleats formed by said inner pleating members are located with all of the pleats being situated between the V-folded sheet portion.
Claim 9
Dependent Claim
35 words
The combination of claim 7 and wherein a means is operatively connected with said outer pleating members for moving them through said pleating plane to form in a sheet outer pleats which overlap each other.
Claim 10
Dependent Claim
83 words
The combination of claim 7 and wherein said inner V-fold means carries a pair of pleating plates situated on opposite sides of said feed plane symmetrically with respect thereto and extending substantially perpendicularly through said pleating plane, said inner pleating members being situated in said feed plane and said pleating plates being situated between said feed plane and said outer pleating members so that pleats are formed by said pleating members around said pleating plates which are carried by said inner V-fold means.
Claim 11
Dependent Claim
69 words
The combination of claim 9 and wherein said pleating plates are located between said folding plates of said inner V-fold means, and stripper means for stripping a folded sheet from said folding plates, said stripper means including stripper plates situated between said pleating plates and folding plates and means connected to said stripper plates for moving the latter toward said rolls for stripping a sheet from said folding plates.
Claim 12
Dependent Claim
54 words
The combination of claim 10 and wherein a yieldable means coacts with said inner V-fold means and said stripper plates for normally maintaining the latter at a given position with respect to said inner V-fold means, and said means which moves said stripper plates toward said rolls acting in opposition to said yieldable means.
Claim 13
Dependent Claim
64 words
The combination of claim 1 and wherein said pair of folding plates are inclined inwardly toward said feed plane and respectively terminating terminate in substantially pointed ends located adjacent said feed plane so that said pleating members and folding plates form in the V-folded sheet a pair of pointed portions which have tips meeting each other at the crest of the V-folded sheet portion.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |