USRE32775E - Pinch roller assembly - Google Patents
Pinch roller assembly Download PDFInfo
- Publication number
- USRE32775E USRE32775E US06/912,093 US91209386A USRE32775E US RE32775 E USRE32775 E US RE32775E US 91209386 A US91209386 A US 91209386A US RE32775 E USRE32775 E US RE32775E
- Authority
- US
- United States
- Prior art keywords
- pinch roller
- track
- drum
- carriage
- supplemental
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/28—Holding means for recording surfaces; Guiding means for recording surfaces; Exchanging means for recording surfaces
Definitions
- the present invention relates to graphics plotters including a pinch roller drive on a drum and, more particularly, to an improved pinch roller assembly whereby the pinch roller is mounted to a carriage slideably mounted on a supplemental track below the main track for easy translational movement and first bias means are provided for gently urging the carriage into alignment and second bias means are provided for urging the pinch roller down and the carriage to grip the supplemental track with sufficient force to prevent further translational movement.
- a releasable bar is pivotally mounted to the carriage for selectively holding the pinch roller off the drum and to release the gripping force on the supplemental track during translational adjustment of the assembly.
- Graphics plotters employing a drum with pinch roller drive are well known in the art.
- a rotatable drum is bi-directionally movable by a motor drive assembly to move a strip of paper or other writing medium beneath a pen or other writing device.
- the pen is mounted to a pen carriage assembly moving at right angles to the strip of paper's movement across the drum in response to a signal. Between the movements of the pen carriage and the drum, the two right angular directions of movement required are affected such that the plot is created on the paper.
- a pair of pinch rollers are provided with one adjacent each edge of the paper urging the paper against the surface of the drum and rolling along the paper at the point of contact with the drum as the drum is turned so that the paper is moved along with the drum.
- the rotational axes of the pinch rollers and the drum must be kept in perfect parallel alignment.
- the pinch rollers are usually made adjustable as to their position along the surface of the drum. Unfortunately, to date, this has created two mutually exclusive conditions.
- a graphics plotter having a rotatable drum, a pinch roller for holding a writing medium against the drum for longitudinal movement thereby, and a carriage track disposed above and parallel to the drum for supporting a pen block carriage for traverse movement by the improvement of the present invention comprising: a supplemental track carried by the carriage track and extending downward therefrom, the supplemental track being an inverted T-shape in cross section; a pinch roller carriage having a pair of spaced, parallel side members, each having a pair of facing L-shaped gripping members extending upward therefrom, the gripping members being adapted to fit loosely about the supplemental track whereby the pinch roller carriage hangs therefrom and is easily slideable traversely along the supplemental track; a first pivot pin disposed between the side members and parallel thereto at about the location of the ones of the gripping members closest to the drum; a pivot arm pivotally mounted on the first pivot pin and extending between the side members, one end of the pivot arm terminating above the drum in a yok
- FIG. 1 is a partially cutaway plan view of the pinch roller carriage assembly of the present invention.
- FIG. 2 is a rear elevation view of the pinch roller assembly of the present invention in its down and locked position.
- FIG. 3 is a side view of the pinch roller of the present invention in its down and locked position.
- FIG. 4 is a rear elevation view showing the pinch roller assembly of the present invention in its released position.
- FIG. 5 is a side elevation of the pinch roller assembly of the present invention in its released position.
- Plotter 10 includes a drum 12 having a longitudinal axis 14.
- a pen carriage track 16 is positioned above, behind, and parallel to the drum 12.
- a pen block carriage (not shown) moves along the carriage track 16 during operation of the plotter 10 to move a pen traversely across the moving strip of writing medium.
- the pinch roller assembly of the present invention is generally indicated as 18.
- a supplemental track 20 is incorporated into the carriage track 16.
- supplemental track 20 could also be a separate piece attached to the carriage track 16 as by bolts, or the like.
- Supplemental track 20 is generally an inverted T-shape in cross section.
- Pinch roller assembly 18 includes a pair of parallel side members 22 which are in parallel spaced relationship, each having a pair of facing L-shaped gripping members 24 adapted to fit loosely about the cross arms of the T-shaped supplemental track 20 as best seen in the side views of FIGS. 3 and 5.
- the two L-shaped gripping members 24 on each side member 22 define a pair of parallel, generally T-shaped slots into which the T-shaped supplemental track 20 fits with sufficient clearance that the side members 22 can hang from the supplemental track 20 and be moved easily longitudinally along the supplemental track 20.
- the two parallel side members 22 are joined at the end furthest from the drum 12 by a generally U-shaped member 26 comprising a pair of vertical bars 28 connected at the bottom to respective ones of the parallel side members 22 and a cross bar 30 interconnecting the top of the two vertical bars 28.
- a first pivot pin 32 is mounted between the side members 22 and normal thereto at about the location of the two gripping members 24 closest to the drum.
- a pivot arm 34 is pivotally mounted on the first pivot pin 32. Pivot arm 34 terminates on one end above the drum 12 in a yoke generally indicated as 36 comprising a pair of parallel spaced side pieces 38 lying in planes normal to the pivot pin 32.
- a second pivot pin 40 is mounted between the side pieces 38 and normal thereto.
- a pinch roller 42 is mounted on the second pivot pin 40 for rotational movement.
- At 44 and 46 are surfaces on the forward side of the supplemental track 20 (where "forward” means closest to the drum and “rear” means furthest from the drum) which are parallel to the longitudinal axis 14 of the drum 12.
- At 48 and 50 are surfaces on the forward gripping members 24 which lie in planes which are parallel to the two pivot pins 32, 40 and are normal to the side members 22 and side pieces 38.
- a pair of leaf springs 54 are mounted to the rearward gripping members 24 as with screws 56.
- Leaf springs 54 extend outward along the rear surface 58 of the supplemental track 20 pushing thereagainst and thereby urging the surfaces 44, 46 towards the surfaces 48, 50.
- the urging force of the leaf springs 54 is sufficient to pull the side members 22 towards a position of contact between the surfaces 44, 48 and/or 46, 50 but with insufficient force to cause binding or an excess of friction whereby the pinch roller assembly 18 is easily slid along the supplemental track 20 for positioning the pinch roller 42 along the length of the drum 12.
- the rear portion of the pivot arm 34 extends in part to a point below the cross bar 30.
- a coil spring 60 is connected between a pin 62 extending from the rear of pivot arm 34 to a pin 64 extending from the cross bar 30.
- Coil spring 60 is extended to fit over pins 62, 64 whereby an upward force is exerted on the rear of the pivot arm 34 by spring 60 as indicated by arrow 66.
- the result is a gripping or pinching force of the L-shaped gripping members 24 on the supplemental track 20 in the manner shown in FIG. 3.
- the pinch roller 42 is moved downward to contact the surface of the drum 12 at 68 as the pivot arm 34 is rotated counterclockwise about the first pivot pin 32 as FIG.
- arm 74 extends out from the other portion of the back of the pivot arm 34 and beneath one of the vertical bars 28 of the U-shaped member 26.
- Pressure release arm 76 is pivotally mounted at 78 to that vertical bar 28.
- Pressure release arm 76 comprises an upper portion 80 adapted to be hand rotated by the plotter operating personnel and a lower portion 82 adapted to contact the arm 74 and hold it against the bias pressure of spring 60. In its released position of FIG. 2, the lower portion 82 is touching the arm 74 but is not holding it against the pressure of spring 60 whereby the gripping action as above-described is in effect. As shown in FIGS.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/912,093 USRE32775E (en) | 1984-07-23 | 1986-09-29 | Pinch roller assembly |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/633,171 US4567491A (en) | 1984-07-23 | 1984-07-23 | Pinch roller assembly |
US06/912,093 USRE32775E (en) | 1984-07-23 | 1986-09-29 | Pinch roller assembly |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/633,171 Reissue US4567491A (en) | 1984-07-23 | 1984-07-23 | Pinch roller assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE32775E true USRE32775E (en) | 1988-11-01 |
Family
ID=27091819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/912,093 Expired - Fee Related USRE32775E (en) | 1984-07-23 | 1986-09-29 | Pinch roller assembly |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE32775E (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1150345A (en) * | 1913-02-26 | 1915-08-17 | Underwood Typewriter Co | Type-writing machine. |
US3233807A (en) * | 1964-06-03 | 1966-02-08 | Rca Corp | Roller mechanism |
US4514740A (en) * | 1982-06-19 | 1985-04-30 | Alps Electric Co., Ltd. | Sheet guide mechanism in a recording device |
-
1986
- 1986-09-29 US US06/912,093 patent/USRE32775E/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1150345A (en) * | 1913-02-26 | 1915-08-17 | Underwood Typewriter Co | Type-writing machine. |
US3233807A (en) * | 1964-06-03 | 1966-02-08 | Rca Corp | Roller mechanism |
US4514740A (en) * | 1982-06-19 | 1985-04-30 | Alps Electric Co., Ltd. | Sheet guide mechanism in a recording device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CALCOMP INC., 2411 WEST LA PALMA AVENUE, ANAHEIM, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SANDERS ASSOCIATES, INC.;REEL/FRAME:004914/0463 Effective date: 19880630 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: CALCOMP INC., A CA CORP., CALIFORNIA Free format text: RE-RECORD OF AN INSTRUMENT RECORDED JULY 11, 1988, AT REEL 4914, FRAME 463-465 TO CORRECT SERIAL NUMBER 919,951 AND 091,148, ERRONEOUSLY STATED;ASSIGNOR:SANDERS ASSOCIATES, INC.;REEL/FRAME:005020/0311 Effective date: 19880630 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees |