The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
This device combines into one apparatus a means for detecting ribbon depletion, for cleaning the ribbon and for tensioning the ribbon, as shown in the Figures.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
96% of the total text.
Page 1 of 1
End of Ribbon Switch, Thermal Transfer Ribbon Cleaner, And Tensioning
Device for the Ribbon
This device combines into one apparatus a means for detecting ribbon
depletion, for cleaning the ribbon and for tensioning the ribbon, as shown in the
The device includes a stationary curved piece 2, having a piece of felt 2A or
other cloth material attached to the surface of the curved piece for contact with
the ribbon to wipe the ribbon clean of dust. The curved piece is typically fixed to
the printer. An L-shaped tensioning device 3, having upper and lower portions
3A, 3B, is biased in the direction of arrow A by a rod and torsion spring assembly 6. The upper portion 3A of the device 3 includes a tensioning spring 5 which
rotates and applies the desired tension to the ribbon when the lower portion 3B of
the tensioning device is hit by a ribbon cartridge 7 inserted into the printer.
The tensioning spring 5 is made of a conductive material such as copper, and
since the end of the ribbon is also coated with a conductive material, when the
spring and end of the ribbon come into contact, a circuit 8 can be closed and the
printer is signaled that it is at the end of the ribbon. Alternatively, the springs,
instead of forming an open/close circuit, can be grounded and thereby used to
remove static electricity on the ribbon as it passes the tensioning device.
When the cartridge is lifted off the lower portion 3B, the torsion spring 6
returns the tensioning device 3 to i...