diff --git a/mayan/apps/sources/classes.py b/mayan/apps/sources/classes.py
index d54c9d2608..ab04b2d675 100644
--- a/mayan/apps/sources/classes.py
+++ b/mayan/apps/sources/classes.py
@@ -1,22 +1,12 @@
 from __future__ import absolute_import
 
 import base64
-import errno
 import os
 import urllib
 
-from django.core.exceptions import ObjectDoesNotExist
 from django.core.files import File
-from django.core.files.storage import FileSystemStorage
-from django.utils.encoding import smart_str
-from django.utils.translation import ugettext
-from django.utils.translation import ugettext_lazy as _
 
-from common.utils import fs_cleanup
-from converter.api import convert, cache_cleanup
-from converter.literals import (DEFAULT_ZOOM_LEVEL, DEFAULT_ROTATION,
-    DEFAULT_PAGE_NUMBER, DEFAULT_FILE_FORMAT_MIMETYPE)
-from documents.conf.settings import DISPLAY_SIZE, THUMBNAIL_SIZE
+from converter.api import convert
 from mimetype.api import get_mimetype
 
 
@@ -54,7 +44,7 @@ class StagingFile(object):
             image.close()
             return u'data:%s;base64,%s' % (mimetype, base64_data)
         else:
-            return file_path
+            return converted_file_path
 
     def delete(self):
         os.unlink(self.get_full_path())
diff --git a/mayan/apps/sources/models.py b/mayan/apps/sources/models.py
index 19cfb418b7..70b71628e6 100644
--- a/mayan/apps/sources/models.py
+++ b/mayan/apps/sources/models.py
@@ -7,7 +7,6 @@ import os
 from django.contrib.contenttypes import generic
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError
-from django.core.files.storage import FileSystemStorage
 from django.db import models, transaction
 from django.utils.translation import ugettext_lazy as _
 
diff --git a/mayan/apps/sources/resources.py b/mayan/apps/sources/resources.py
index 020545f467..abeeee98a0 100644
--- a/mayan/apps/sources/resources.py
+++ b/mayan/apps/sources/resources.py
@@ -5,7 +5,6 @@ import logging
 from rest_framework import serializers
 from rest_framework.reverse import reverse
 
-from .classes import StagingFile
 from .models import StagingFolder
 
 logger = logging.getLogger(__name__)
diff --git a/mayan/apps/sources/urls.py b/mayan/apps/sources/urls.py
index a15c01091c..79caaae072 100644
--- a/mayan/apps/sources/urls.py
+++ b/mayan/apps/sources/urls.py
@@ -2,7 +2,8 @@ from __future__ import absolute_import
 
 from django.conf.urls import patterns, url
 
-from .api import APIStagingSourceListView,APIStagingSourceView, APIStagingSourceFileView, APIStagingSourceFileImageView
+from .api import (APIStagingSourceListView, APIStagingSourceView,
+    APIStagingSourceFileView, APIStagingSourceFileImageView)
 from .literals import (SOURCE_CHOICE_WEB_FORM, SOURCE_CHOICE_STAGING,
     SOURCE_CHOICE_WATCH)
 from .wizards import DocumentCreateWizard
diff --git a/mayan/apps/sources/views.py b/mayan/apps/sources/views.py
index 00d1032b1e..7cd9bbfadd 100644
--- a/mayan/apps/sources/views.py
+++ b/mayan/apps/sources/views.py
@@ -3,7 +3,6 @@ from __future__ import absolute_import
 from django.conf import settings
 from django.contrib import messages
 from django.core.exceptions import PermissionDenied
-from django.core.files.storage import FileSystemStorage
 from django.core.urlresolvers import reverse
 from django.http import HttpResponseRedirect
 from django.shortcuts import render_to_response, get_object_or_404
@@ -13,11 +12,8 @@ from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext
 from django.utils.translation import ugettext_lazy as _
 
-import sendfile
-
 from acls.models import AccessEntry
 from common.utils import encapsulate
-from documents.conf.settings import THUMBNAIL_SIZE
 from documents.exceptions import NewDocumentVersionNotAllowed
 from documents.models import DocumentType, Document
 from documents.permissions import (PERMISSION_DOCUMENT_CREATE,
@@ -35,7 +31,6 @@ from .models import (WebForm, StagingFolder, SourceTransformation,
 from .permissions import (PERMISSION_SOURCES_SETUP_VIEW,
     PERMISSION_SOURCES_SETUP_EDIT, PERMISSION_SOURCES_SETUP_DELETE,
     PERMISSION_SOURCES_SETUP_CREATE)
-from .staging import create_staging_file_class
 
 
 def document_create_siblings(request, document_id):
diff --git a/mayan/apps/sources/widgets.py b/mayan/apps/sources/widgets.py
index 9353500c97..e0cbb66fff 100644
--- a/mayan/apps/sources/widgets.py
+++ b/mayan/apps/sources/widgets.py
@@ -8,8 +8,7 @@ from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
 
 from converter.literals import DEFAULT_PAGE_NUMBER, DEFAULT_ROTATION, DEFAULT_ZOOM_LEVEL
-from documents.conf.settings import (THUMBNAIL_SIZE, PREVIEW_SIZE,
-    DISPLAY_SIZE, MULTIPAGE_PREVIEW_SIZE)
+from documents.conf.settings import THUMBNAIL_SIZE, PREVIEW_SIZE
 
 
 class FamFamRadioFieldRenderer(forms.widgets.RadioFieldRenderer):