IE67875B1 - A printer - Google Patents
A printerInfo
- Publication number
- IE67875B1 IE67875B1 IE403690A IE403690A IE67875B1 IE 67875 B1 IE67875 B1 IE 67875B1 IE 403690 A IE403690 A IE 403690A IE 403690 A IE403690 A IE 403690A IE 67875 B1 IE67875 B1 IE 67875B1
- Authority
- IE
- Ireland
- Prior art keywords
- lid
- print head
- body portion
- printer
- paper
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
- B41J25/316—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with tilting motion mechanisms relative to paper surface
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Electronic Switches (AREA)
- Common Mechanisms (AREA)
Abstract
A housing containing a paper roller 30 has a hinged lid 12 with a thermal print head 20 mounted under the lid. A roller 32 feeds paper 31 past the print head 20. The head 20 is mounted under the lid 12 on a support member 23 which is downwardly biassed by springs 27, so that when the lid is closed the print head is brought to bear resiliently against the roller 32. A flexible plastics guide (36, Fig. 2) directs paper 31 from the roll 30 to the roller 32.
Description
A PRINTER
This invention relates to a printer, in particular to a printer which may be used inter alia as a computer output device.
According to the present invention there is 5 provided a printer comprising a housing having a main body portion for containing a roll of paper to be printed and a lid which is hinged adjacent one edge to the main body portion and which has a thermal print head mounted under the lid, the main body portion further containing a feed roller for frictionally engaging paper from the roll and feeding it past the print head, the print head being mounted under the lid by means which provides a downward spring bias to the print head so that when the lid is closed the print head is brought to bear resiliently against the feed roller, wherein when the lid is closed a slot is defined between the said one edge of the lid and the main body portion, such slot being substantially parallel to the hinge axis and serving as an exit for the printed paper from the housing.
Preferably, the axis of the feed roller is substantially parallel to the axis of the lid hinge, and the print head comprises a linear array of thermal print elements disposed substantially parallel to the axis of the feed roller.
Further, the print head may be carried by a support member which is mounted to the underside of the lid for pivoting about an axis parallel to the axis of the lid hinge, and the spring bias means may comprise at least one spring between the support member and the underside of the lid.
A paper guide may be provided in the form of a sheet of flexible plastics material which is fitted into the main body portion of the housing to curve upwardly from adjacent the base of the body portion into contact with the feed roller.
In the preferred embodiment, when the lid is closed a slot is defined between the edge of the lid and the housing main body portion in the region of, and substantially parallel to, the lid hinge. The slot serves as an exit for the printed paper from the housing.
An embodiment of the invention will now be described by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a perspective view of a printer according to the embodiment of the invention, with the lid closed;
Figure 2 is a perspective view of the printer 25 with the lid open but with no paper in the printer;
Figure 3 is a perspective view of the printer with the lid open and with paper in the printer;
Figure 4 is a cross-sectional view through the printer;
Figure 5 is a perspective view of underneath the printer lid omitting the external plastics lid moulding;
and
Figure 6 is a perspective cutaway view of the inside of the printer with the lid removed.
Referring to the drawings, a printer comprises a housing 10 having a main body portion 11 and a lid 12.
The main body portion 11 includes an internal metal chassis 13, and the lid 12 includes an internal metal chassis 14 in the form of a shallow inverted tray. The visible external parts 15 of the housing are of moulded plastics material.
The lid 12 is hinged adjacent the rear edge 16 to the main body portion 11. The hinging is effected by a straight metal rod (not shown) passing through two pairs of aligned apertures 17, 18 in the lid and body portion respectively, one pair at each side of the lid.
An elongate thermal print head 20 is mounted under the lid 12 (see Figures 4 and 5). In particular, the print head 20 comprises a linear array 21 of thermal print elements which is substantially parallel to the axis of the lid hinge as defined by the apertures 17.
The print head is mounted under the lid by being clamped, by a clamping strip 22, to an elongate support member 23.
The support member 23 includes a pair of brackets 24, one at each end of the member 23, by which the member 23 is itself mounted under the lid 12. Each bracket 24 is pivoted at a respective nut 25 and bolt 26 to the corresponding side of the chassis 14 in the lid
12. Thus the member 23 is able to pivot as a whole under the lid 12. The pivotal axis, as defined by the bolts 26, is substantially parallel to the axis of the lid hinge.
The support member 23, and hence the thermal print head 20, is spring biassed downwardly away from the underside of the lid 12 by two coil springs 27 located under permanent compression between the support member 23 and the chassis 14, the coil springs tending to rotate the member 23 in an anticlockwise direction as referred to Figure 4. The downward motion is limited by stop members 28 formed at the ends of the brackets 24 on the opposite side of the pivot points 25/26 to the member 23.
The main body portion 11 of the housing 10 is adapted to contain a roll 30 of paper 31 to be printed, and has a feed roller 32 for frictionally engaging paper from the roll 30 and feeding it past the print head 20 when the lid 12 is closed. The axis of the feed roller
32 is substantially parallel to the axis of the lid hinge. The feed roller 32 is driven by a gear train 33 from a stepping motor (not shown).
The paper 31 is loaded when the lid 12 is open (Figures 2 and 3) by passing it manually from the roll
upwardly and rearwardly across the top of the feed roller 32 and below the thermal print head 20, and out of the housing behind the rear edge 16 of the lid 12.
The lid 12 is then closed by pushing it down until a pair of projecting studs 34 on either side of the lid engage under respective latches 35 provided in the main body portion. When the lid 12 is thus closed, the print head 20 is brought to bear resiliently against the feed roller 32, there being a small degree of relative upward displacement of the print head 20 and support member 23 within the lid 12 against the bias of the coil springs 27. The paper 31 is sandwiched snugly between the feed roller 32 and the print head 20.
The paper is fed past the print head 20, during operation of the printer, by rotation of the feed roller 32 by the stepping motor referred to above, the friction of the feed roller 32 against the paper 31 15 being greater than the friction of the paper against the relatively smooth print head 20.
A paper loading guide is provided in the form of a sheet of flexible plastics material 36 (Figure 2) which is fitted into the main body portion 11 of the housing to curve upwardly from adjacent the base of the body portion into contact with the feed roller 32.
The paper exits from the housing 10 from a slot 37 in the top of the housing 10 defined between the rear edge of the lid 12 and the housing main body portion 11 in the region of, and substantially parallel to, the lid hinge. A paper exit guide 40 (Figure 4) is provided to guide paper emerging from the rear of the feed roller 32 upwardly to the slot 37.
The closed lid 12 may be opened again by releasing the latches 35 - this is done by pressing a knob 38 on the outside of the housing, the knob being mechanically coupled to the latches.
The spring pressure is brought to bear and the head 20 is located in such a fashion that between forward and reverse there is no deterioration of print quality and when opening and closing the lid 12, repeatability and accuracy are controlled and assured with optimum setting achieved each time the lid is closed.
Claims (5)
1. A printer comprising a housing having a main body portion for containing a roll of paper to be printed and a lid which is hinged adjacent one edge to 5 the main body portion and which has a thermal print head mounted under the lid, the main body portion further containing a feed roller for frictionally engaging paper from the roll and feeding it past the print head, the print head being mounted under the lid by means which 10 provides a downward spring bias to the print head so that when the lid is closed the print head is brought to bear resiliently against the feed roller, wherein when the lid is closed a slot is defined between the said one edge of the lid and the main body portion, such slot 15 being substantially parallel to the hinge axis and serving as an exit for the printed paper from the housing.
2. A printer as claimed in claim 1, wherein the 20 axis of the feed roller is substantially parallel to the axis of the lid hinge, and the print head comprises a linear array of thermal print elements disposed substantially parallel to the axis of the feed roller. 25
3. A printer as claimed in claim 2, wherein the print head is carried by a support member which is mounted to the underside of the lid for pivoting about an axis parallel to the axis of the lid hinge, and wherein the spring bias means comprises at least one 30 spring between the support member and the underside of the lid.
4. A printer as claimed in any preceding claim, wherein a paper guide is provided in the form of a sheet of flexible plastics material which is fitted into the main body portion of the housing to curve upwardly from adjacent the base of the body portion into contact with the feed roller.
5. 5. A printer substantially as described with reference to the accompanying drawings.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE403690A IE67875B1 (en) | 1990-11-08 | 1990-11-08 | A printer |
GB9123827A GB2250478A (en) | 1990-11-08 | 1991-11-08 | Mounting a thermal print head in a printer |
ZA918894A ZA918894B (en) | 1990-11-08 | 1991-11-08 | A printer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE403690A IE67875B1 (en) | 1990-11-08 | 1990-11-08 | A printer |
Publications (2)
Publication Number | Publication Date |
---|---|
IE904036A1 IE904036A1 (en) | 1992-05-20 |
IE67875B1 true IE67875B1 (en) | 1996-05-01 |
Family
ID=11039297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE403690A IE67875B1 (en) | 1990-11-08 | 1990-11-08 | A printer |
Country Status (3)
Country | Link |
---|---|
GB (1) | GB2250478A (en) |
IE (1) | IE67875B1 (en) |
ZA (1) | ZA918894B (en) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2697776B1 (en) * | 1992-11-06 | 1995-03-03 | Axiohm | Opening thermal printing device. |
GB2282568B (en) * | 1993-09-22 | 1998-04-22 | Asahi Optical Co Ltd | Thermal line printer |
JP3600634B2 (en) * | 1994-05-18 | 2004-12-15 | ペンタックス株式会社 | Thermal printer |
JPH07309052A (en) * | 1994-05-18 | 1995-11-28 | Asahi Optical Co Ltd | Thermal printer |
GB2311039B (en) * | 1996-03-13 | 2000-01-19 | Esselte Nv | Tape printing apparatus and tape holding case |
FR2763887B1 (en) * | 1997-05-30 | 1999-08-13 | Ascom Monetel Sa | THERMAL PRINTER WITH EASY REPLACEMENT OF PRINTING PAPER |
US6155731A (en) * | 1997-10-17 | 2000-12-05 | Axiohm Transaction Solutions, Inc. | Printing apparatus with cover actuated drive source |
US6784906B2 (en) * | 2001-12-18 | 2004-08-31 | Ncr Corporation | Direct thermal printer |
JP2003237118A (en) * | 2002-02-21 | 2003-08-27 | Sii P & S Inc | Thermal printer |
GB2391514B (en) | 2002-08-06 | 2006-03-22 | Markem Tech Ltd | Printing apparatus and methods |
US7589752B2 (en) | 2005-01-15 | 2009-09-15 | Ncr Corporation | Two-sided thermal printing |
US8462184B2 (en) | 2005-12-08 | 2013-06-11 | Ncr Corporation | Two-sided thermal printer control |
US8670009B2 (en) | 2006-03-07 | 2014-03-11 | Ncr Corporation | Two-sided thermal print sensing |
US8367580B2 (en) | 2006-03-07 | 2013-02-05 | Ncr Corporation | Dual-sided thermal security features |
US8222184B2 (en) | 2006-03-07 | 2012-07-17 | Ncr Corporation | UV and thermal guard |
US7777770B2 (en) | 2005-12-08 | 2010-08-17 | Ncr Corporation | Dual-sided two-ply direct thermal image element |
US8721202B2 (en) | 2005-12-08 | 2014-05-13 | Ncr Corporation | Two-sided thermal print switch |
US7710442B2 (en) | 2006-03-07 | 2010-05-04 | Ncr Corporation | Two-sided thermal print configurations |
US8043993B2 (en) | 2006-03-07 | 2011-10-25 | Ncr Corporation | Two-sided thermal wrap around label |
US8067335B2 (en) | 2006-03-07 | 2011-11-29 | Ncr Corporation | Multisided thermal media combinations |
US8083423B2 (en) | 2006-03-01 | 2011-12-27 | Ncr Corporation | Thermal indicators |
US8114812B2 (en) | 2006-03-03 | 2012-02-14 | Ncr Corporation | Two-sided thermal paper |
US7764299B2 (en) | 2006-03-07 | 2010-07-27 | Ncr Corporation | Direct thermal and inkjet dual-sided printing |
US9024986B2 (en) | 2006-03-07 | 2015-05-05 | Ncr Corporation | Dual-sided thermal pharmacy script printing |
US8173575B2 (en) | 2006-03-07 | 2012-05-08 | Ncr Corporation | Dual-sided thermal form card |
US8194107B2 (en) | 2007-06-04 | 2012-06-05 | Ncr Corporation | Two-sided thermal print command |
US8576436B2 (en) | 2007-06-20 | 2013-11-05 | Ncr Corporation | Two-sided print data splitting |
US9056488B2 (en) | 2007-07-12 | 2015-06-16 | Ncr Corporation | Two-side thermal printer |
US8848010B2 (en) | 2007-07-12 | 2014-09-30 | Ncr Corporation | Selective direct thermal and thermal transfer printing |
US8211826B2 (en) | 2007-07-12 | 2012-07-03 | Ncr Corporation | Two-sided thermal media |
US7531224B2 (en) | 2007-07-12 | 2009-05-12 | Ncr Corporation | Two-sided thermal transfer ribbon |
US8182161B2 (en) | 2007-08-31 | 2012-05-22 | Ncr Corporation | Controlled fold document delivery |
US8504427B2 (en) | 2007-09-28 | 2013-08-06 | Ncr Corporation | Multi-lingual two-sided printing |
US7839425B2 (en) | 2008-09-17 | 2010-11-23 | Ncr Corporation | Method of controlling thermal printing |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2121359B (en) * | 1982-05-11 | 1985-09-04 | Tokyo Shibaura Electric Co | Thermal transfer recording apparatus |
US4614949A (en) * | 1983-10-20 | 1986-09-30 | Ricoh Company, Ltd. | Transfer-type thermal printer |
GB2162794B (en) * | 1984-06-12 | 1989-01-11 | Canon Kk | Recording apparatus |
EP0183356B1 (en) * | 1984-10-02 | 1991-07-03 | Fujitsu Limited | Front-loading paper feed for a printer |
US5030968A (en) * | 1988-12-30 | 1991-07-09 | Benson James A | Recorder enclosure with printhead and roller attached to pivotable covers |
-
1990
- 1990-11-08 IE IE403690A patent/IE67875B1/en not_active IP Right Cessation
-
1991
- 1991-11-08 ZA ZA918894A patent/ZA918894B/en unknown
- 1991-11-08 GB GB9123827A patent/GB2250478A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB9123827D0 (en) | 1992-01-02 |
ZA918894B (en) | 1992-08-26 |
GB2250478A (en) | 1992-06-10 |
IE904036A1 (en) | 1992-05-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Patent lapsed |