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.
A tractor door of a printer shown in the Figure includes a slot that closely engages the sides of the drive pins to guide the tractor belt.
English (United States)
This text was extracted from a PDF file.
100% of the total text.
Page 1 of 1
Belt Guiding Tractor Doors
A tractor door of a printer shown in the Figure includes a slot that closely
engages the sides of the drive pins to guide the tractor belt.
Referring to the Figure which is a section of a tractor drive, a tractor door 1 is
hinged to a central block of the tractor assembly 2 supporting a tractor belt 3.
The endless tractor belt includes a plurality of attached, uniformly spaced drive
pins 4 that extend outwardly from the belt surface. The hinged tractor door
pivotally swings shut over the top driving surface of the tractor belt, and a slot 5
in the door closely engages the sides of the drive pins of the tractor belt.
In operation, the tractor door provides a guide for urging the web and
associated perforations of the paper down onto the drive pins. The slot in the
tractor door also functions as a lateral guide for the tractor belt as it moves
linearly along the tractor since the slot and the drive pins are closely engaged.
This eliminates the need to guide the tractor belt by the use of lateral or belt edge
guides in the tractor assembly, thereby reducing the tolerance buildup between
the tractor belt, frame and door, and improving the paper handling performance
of the printer.